Very hot with “feels-like” temperatures facing South Florida. Heat-related health risks to know.
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Diverging Reports Breakdown
Extreme heat expected in South Florida this weekend could cause health risks to some
The NEXT Weather Team is tracking a scorching weekend across South Florida. While we will not be expecting a Heat Advisory, we will see heat indexes of 100-105 throughout the day on Saturday. The heat and dry conditions last all weekend with the regular summer rain returning by midweek.
Very hot with “feels-like” temperatures facing South Florida. Heat-related health risks to know.
Very hot with “feels-like” temperatures facing South Florida. Heat-related health risks to know.
The NEXT Weather Team is tracking a scorching weekend across South Florida. While we will not be expecting a Heat Advisory, we will see heat indexes of 100-105 throughout the day on Saturday.
Those triple digit “feels like” temperatures will return on Sunday. A high-pressure system moving across Northern Florida is driving away any chance we have of rain this weekend.
The heat indexes will peak around noon on Saturday and last through the early evening hours and will not “cool-down” until after midnight.
It’s important to stay hydrated, limit outdoor afternoon activity and wear light-colored clothing. You’re also encouraged to check on your senior relatives and neighbors who are extremely susceptible to the heat.
The heat and dry conditions last all weekend with the regular summer rain returning by midweek.
Heat advisory issued for South Florida. It’ll feel like 105+ degrees
Sunny and hot conditions are expected on Friday with highs in the low-90s and feels-like numbers at 105 degrees and above. A heat advisory has been issued for South Florida from 11 a.m. until 6 p.m., the National Weather Service said.
Sunny and hot conditions are expected on Friday with highs in the low-90s and feels-like numbers at 105 degrees and above.
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In response to this, a heat advisory has been issued for South Florida from 11 a.m. until 6 p.m., the National Weather Service said.
There will be a breeze on Friday that will take the edge off a bit, but if you are planning on going to the beach, know that we are expecting a high risk of rip currents.
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Small craft should use caution as well as seas run 2-3 feet with a moderate chop on Biscayne Bay.
Look for similar conditions all weekend, with maybe a little less breeze.
Tips for dealing with the heat
The Red Cross and the National Weather Service (NWS) have a series of recommendations for facing days with high temperatures and avoiding health problems.
Triple digit “feels like” temps in South Florida
Temperatures in Miami-Dade and Broward will reach near 90 degrees. Heat index values will climb to around 102. There is a 20% chance for afternoon storms, these will mostly remain inland and over Everglades.
Tuesday got to a warm start with temperatures in the low 80s across Miami-Dade and Broward. In the afternoon, highs will climb to near 90 degrees, but it will feel like the upper 90s and low 100s when the humidity is factored in. Hydrate early and often with water throughout the day as heat index values climb to around 102.
While there is a 20% chance for afternoon storms, these will mostly remain inland and over the Everglades.
For those planning to beat the heat at the beach, the rip current risk is low but the UV index is extreme. There are no marine alerts for boaters today.
Keep the umbrella nearby for the back half of the week as a disturbance brings scattered showers and storms beginning Thursday. The National Weather Service said there is a 60% chance of rain on Thursday and a 50% chance on Friday through the weekend.
Naples flips from watching tropics to trying to stay cool. Heat advisory issued
Naples, Immokalee and other locations in Collier won’t be much better, with a heat index ranging between 100 and 107 degrees. The heat index could get as high as 111, with the strongest heat expected along the southern Gulf Coast. A major heat risk means there is a risk for heat-related illnesses for most residents, especially for those without access to air conditioning or who don’t stay hydrated. Temperatures are expected to climb into the mid 90s over inland areas, with heat indices ranging between100 and 107. The National Weather Service issued a heat advisory for South Florida from 11 a.m. July 18 until 6 p.m., with the heat index expected to reach 105 to 111 degrees. In Florida, except for Miami-Dade County, the National Weather Services offices around the state would issue a heat Advisory if the heatIndex is expected to hit 108 to 112 degrees. It’s important to note the chart above shows the combination of air temperature with humidity. In direct sun, the air temperature can be up to 15 degrees higher.
Southwest Florida is experiencing a heat index between 100 and 107 degrees.
Central Florida and parts of the East Coast face a major heat risk, increasing the chance of heat-related illnesses.
From rain to heat, Naples’ weather continues to swing from one extreme to the next.
After most of this week was spent keeping an umbrella handy as residents watched Invest 93L move across the state into the Gulf, most of Naples and Collier County will spend Friday, July 18, trying to find some place to stay cool.
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A heat advisory has been issued for the first time this summer in Naples, according to the National Weather Service Miami. The heat index could get as high as 111, with the strongest heat expected along the southern Gulf Coast.
Naples, Immokalee and other locations in Collier won’t be much better, with a heat index ranging between 100 and 107.
Here’s what to expect today.
Weather watches and warnings issued in Florida
Heat advisory issued for South Florida. Heat index could hit 111
The National Weather Service issued a heat advisory for South Florida from 11 a.m. July 18 until 6 p.m.
The heat index could reach between 105 and 111 across portions of southeast, south and southwest Florida and could reach even higher is some isolated locations, the National Weather Service said.
The strongest heat is expected along the Gulf Coast.
What to expect today in South Florida:
Naples : High 93. Heat index as high as 107
: High 93. Heat index as high as 107 Immokalee: High 96. Heat index as high as 107
High 96. Heat index as high as 107 West Palm Beach: High 86. Heat index as high as 101
High 86. Heat index as high as 101 Miami: High 88. Heat index as high as 103
Naples could see heat index as high as 107
Drier air is moving into the area, allowing temperatures to increase across Southwest Florida and the west coast. Temperatures are expected to climb into the mid 90s over inland areas, with heat indices ranging between 100 and 107.
A major heat risk means there is a risk for heat-related illnesses for most residents, especially for those without access to air conditioning or who don’t stay hydrated.
The National Weather Service recommends:
Drink plenty of water
Wear lightweight, light-colored clothing
Avoid outdoor activities during the warmest parts of the day
Stay in air-conditioned location, especially during the day
Heat index and temperature map for US, Florida
What is the heat index?
The heat index is what the temperature feels like to the human body when relative humidity is combined with the air temperature, according to the National Weather Service.
At its most basic: the heat index is what the temperature feels like when you’re outside.
The chart above shows the combination of air temperature with humidity. It’s important to note the chart uses the air temperature in the shade. In direct sun, the air temperature can be up to 15 degrees higher.
In Florida, except for Miami-Dade County, the National Weather Services offices around the state would issue a heat advisory if the heat index is expected to reach 108 to 112 degrees. The National Weather Service Miami said Miami/Dade County wanted a lower threshold for an advisory for its population, which was set at 105 degrees.
NWS issues several types of heat-related warnings
National Weather Service changed its heat watch and warning terms in March 2025. Here’s what you should know:
Excessive heat watches were renamed to extreme heat watches. Issued when dangerous heat is possible and residents are encouraged to be prepared.
Excessive heat warnings were renamed to extreme heat warnings. Issued when dangerous heat is happening or about to happen.
What is a heat advisory? Issued for dangerous heat conditions that are not expected to reach warning criteria.
➤ See when heat watches and warnings could be issued in your area
What is a heat advisory?
A heat advisory is issued for dangerous heat conditions that are not expected to reach warning criteria, according to the National Weather Service.
“Residents are advised to consider postponing or rescheduling outdoor activities, especially during the heat of the day. If you must be outside, be sure to drink plenty of water and take frequent breaks in the shade. Stay in a cool place, especially during the heat of the day and evening.”
When a heat advisory is issued also depends on where you are in Florida.
For most of the state, a heat advisory is issued if the heat index is expected to be between 108 to 112 degrees.
Here is the breakdown by each NWS region. A heat advisory is issued when the heat index is expected to be:
Western Panhandle: 108-112 degrees
108-112 degrees Central Panhandle, North Florida: 108 to 112 within the next 6 to 24 hours or air temperature is forecast to reach 103 degrees
108 to 112 within the next 6 to 24 hours or air temperature is forecast to reach 103 degrees Northeast Florida: 108-112 degrees
108-112 degrees East Central Florida: 108 to 112 degrees
108 to 112 degrees In South Florida : 108 degrees in South Florida or 105 degrees for Miami/Dade and Broward counties
: 108 degrees in South Florida or 105 degrees for Miami/Dade and Broward counties Southwest, West Central Florida: 108-112 or the air temp is greater or equal to 103 degrees
The National Weather Service Miami said Miami/Dade County wanted a lower threshold for a heat advisory for its population.
Florida weather radar for Friday, July 18
Signs, symptoms of heat stroke
Heat stroke is the most serious of heat-related illnesses, according to the Centers for Disease Control. Signs and symptoms include:
Confusion, altered mental status, slurred speech
Loss of consciousness (coma)
Hot, dry skin or profuse sweating
Seizures
Very high body temperature
Heat stroke is fatal if treatment is delayed
What to do:
Call 911
Move the person to a shaded, cool area and remove outer clothing
Cool the person quickly, using the following methods: With a cold water or ice bath, if possible Wet the skin Place cold wet cloths on the skin Place cold wet cloths or ice on the head, neck, armpits, and groin Soak clothing with cool water
Circulate the air around the person to speed cooling
Signs, symptoms of heat exhaustion
Heat exhaustion is the body’s response to an excessive loss of water and salt, usually through excessive sweating, the CDC said. Signs and symptoms include:
Headache
Nausea
Dizziness
Weakness
Irritability
Thirst
Heavy sweating
Elevated body temperature
Decreased urine output
What to do:
Take the person to a clinic or emergency room for medical evaluation and treatment
Call 911 if medical care is unavailable
Have someone stay with the person until help arrives
Remove the person from the hot area
Remove unnecessary clothing, including shoes and socks
Cool the person with cold compresses or have the them wash their head, face, and neck with cold water
Encourage frequent sips of cool water
How to stay safe. What do meteorologists recommend when it’s hot outside?
➤ What’s the best temperature to set your air conditioner thermostat?
Drink plenty of fluids
Stay in an air-conditioned room
Stay out of the sunshine
Check on relatives and neighbors.
Young children and pets should never be left unattended in vehicles under any circumstances. Car interiors can reach lethal temperatures in a matter of minutes.
Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening.
Know the signs and symptoms of heat exhaustion and heat stroke.
Wear lightweight and loose fitting clothing when possible.
To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments.
Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 911.
Stay informed. Get weather alerts via text
What’s next?
We will provide weather coverage as conditions warrant to keep you informed and prepared. Download your local site’s app to ensure you’re always connected to the news. And look for our special subscription offers here.
This story has been updated to include new information.
Florida flips from watching tropics to trying to stay cool. More heat advisories issued
The heat index could get as high as 111 in South Florida, with the strongest heat expected along the southern Gulf Coast. Temperatures are expected to climb into the mid 90s over inland areas, with heat indices ranging between 100 and 107 in Southwest Florida. As of 9:30 a.m., Florida’s entire east coast, large portions of Central Florida and all of South Florida are under a heat advisory until this evening as the heat index climbs to 110. The National Weather Service warned portions of the state’s east coast and Central Florida face a major heat risk. A heat advisory also has been issued for the entire east Coast of Florida until 6 p.m. The heat index is expected to reach between 105 and 111 across portions of southeast, south and southwest Florida and could reach even higher is some isolated locations. A major heat advisory was issued for Northeast Florida at 8:46 a. m., with a heat index of up to 113 across parts of northeast and central Florida. The weather service recommends:Stay in air-conditioned location, especially during the warmest parts of the day.
Temperatures are expected to climb into the mid 90s over inland areas, with heat indices ranging between 100 and 107 in Southwest Florida.
A major heat risk is forecast for portions of Central Florida.
From rain to heat, Florida’s weather continues to swing from one extreme to the next.
After most of this week was spent keeping an umbrella handy as residents watched Invest 93L move across the state into the Gulf, most of Florida will spend Friday, July 18, trying to find some place to stay cool.
➤ Weather alerts via text: Sign up to get updates about current storms and weather events by location
A heat advisory has been issued for the first time this summer in South Florida, according to the National Weather Service Miami. The heat index could get as high as 111, with the strongest heat expected along the southern Gulf Coast.
As the morning progressed, more heat advisories were issued. As of 9:30 a.m., Florida’s entire east coast, large portions of Central Florida and all of South Florida are under a heat advisory until this evening as the heat index climbs as high as 110.
And the National Weather Service warned portions of the state’s east coast and Central Florida face a major heat risk.
Here’s what to expect today.
Weather watches and warnings issued in Florida
What Florida counties are under a heat advisory today, July 18?
As of 9:30 a.m., counties under a heat advisory are:
Heat advisory issued for South Florida. Heat index could hit 111
The National Weather Service issued a heat advisory for South Florida from 11 a.m. July 18 until 6 p.m.
The heat index could reach between 105 and 111 across portions of southeast, south and southwest Florida and could reach even higher is some isolated locations, the National Weather Service said.
The strongest heat is expected along the Gulf Coast.
What to expect today in South Florida:
West Palm Beach: High 86. Heat index as high as 101.
High 86. Heat index as high as 101. Miami: High 88. Heat index as high as 103.
High 88. Heat index as high as 103. Naples : High 93. Heat index as high as 107.
: High 93. Heat index as high as 107. Immokalee: High 96. Heat index as high as 107.
Southwest Florida could see heat index as high as 107
Drier air is moving into the area, allowing temperatures to increase across Southwest Florida and the west coast. Temperatures are expected to climb into the mid 90s over inland areas, with heat indices ranging between 100 and 107.
What to expect today in Southwest Florida:
Fort Myers: High 95. Heat index as high as 103.
High 95. Heat index as high as 103. Sarasota : High 91. Heat index as high as 102.
: High 91. Heat index as high as 102. Tampa: High 95. Heat index as high as 105.
Major heat risk, heat advisory issued for Central Florida, East Coast. Heat index up to 108
A major heat risk is forecast for portions of Central Florida today, July 18, according to the National Weather Service Melbourne. A heat advisory also has been issued for the entire east coast of Florida until 6 p.m. The heat index could get up to 108.
What to expect today in East, Central Florida:
Daytona Beach: High 89. Heat index as high as 104.
High 89. Heat index as high as 104. Melbourne : High 90. Heat index as high as 105.
: High 90. Heat index as high as 105. Vero Beach: High 90. Heat index as high as 102.
High 90. Heat index as high as 102. Stuart : High 88. Heat index as high as 102.
: High 88. Heat index as high as 102. Orlando: High 95. Heat index as high as 105.
A major heat risk means there is a risk for heat-related illnesses for most residents, especially for those without access to air conditioning or who don’t stay hydrated.
The National Weather Service recommends:
Drink plenty of water
Wear lightweight, light-colored clothing
Avoid outdoor activities during the warmest parts of the day
Stay in air-conditioned location, especially during the day
Heat advisory issued for Jacksonville, Northeast Florida. Heat index up to 110
Another heat advisory was issued for Northeast Florida at 8:46 a.m. July 18.
Heat index ranges from 105 to 113 today across portions of inland northeast and north central Florida, the National Weather Service Jacksonville said. The heat advisory is in effect from noon to 6 p.m.
What about the rest of Florida? What’s the forecast for today?
Heat index and temperature map for US, Florida
What is the heat index?
The heat index is what the temperature feels like to the human body when relative humidity is combined with the air temperature, according to the National Weather Service.
At its most basic: the heat index is what the temperature feels like when you’re outside.
The chart above shows the combination of air temperature with humidity. It’s important to note the chart uses the air temperature in the shade. In direct sun, the air temperature can be up to 15 degrees higher.
In Florida, except for Miami-Dade County, the National Weather Services offices around the state would issue a heat advisory if the heat index is expected to reach 108 to 112 degrees. The National Weather Service Miami said Miami/Dade County wanted a lower threshold for an advisory for its population, which was set at 105 degrees.
NWS issues several types of heat-related warnings
National Weather Service changed its heat watch and warning terms in March 2025. Here’s what you should know:
Excessive heat watches were renamed to extreme heat watches. Issued when dangerous heat is possible and residents are encouraged to be prepared.
Excessive heat warnings were renamed to extreme heat warnings. Issued when dangerous heat is happening or about to happen.
What is a heat advisory? Issued for dangerous heat conditions that are not expected to reach warning criteria.
➤ See when heat watches and warnings could be issued in your area
What is a heat advisory?
A heat advisory is issued for dangerous heat conditions that are not expected to reach warning criteria, according to the National Weather Service.
“Residents are advised to consider postponing or rescheduling outdoor activities, especially during the heat of the day. If you must be outside, be sure to drink plenty of water and take frequent breaks in the shade. Stay in a cool place, especially during the heat of the day and evening.”
When a heat advisory is issued also depends on where you are in Florida.
For most of the state, a heat advisory is issued if the heat index is expected to be between 108 to 112 degrees.
Here is the breakdown by each NWS region. A heat advisory is issued when the heat index is expected to be:
Western Panhandle: 108-112 degrees
108-112 degrees Central Panhandle, North Florida: 108 to 112 within the next 6 to 24 hours or air temperature is forecast to reach 103 degrees
108 to 112 within the next 6 to 24 hours or air temperature is forecast to reach 103 degrees Northeast Florida: 108-112 degrees
108-112 degrees East Central Florida: 108 to 112 degrees
108 to 112 degrees In South Florida : 108 degrees in South Florida or 105 degrees for Miami/Dade and Broward counties
: 108 degrees in South Florida or 105 degrees for Miami/Dade and Broward counties Southwest, West Central Florida: 108-112 or the air temp is greater or equal to 103 degrees
The National Weather Service Miami said Miami/Dade County wanted a lower threshold for a heat advisory for its population.
Florida weather radar for Friday, July 18
Signs, symptoms of heat stroke
Heat stroke is the most serious of heat-related illnesses, according to the Centers for Disease Control. Signs and symptoms include:
Confusion, altered mental status, slurred speech
Loss of consciousness (coma)
Hot, dry skin or profuse sweating
Seizures
Very high body temperature
Heat stroke is fatal if treatment is delayed
What to do:
Call 911
Move the person to a shaded, cool area and remove outer clothing
Cool the person quickly, using the following methods: With a cold water or ice bath, if possible Wet the skin Place cold wet cloths on the skin Place cold wet cloths or ice on the head, neck, armpits, and groin Soak clothing with cool water
Circulate the air around the person to speed cooling
Signs, symptoms of heat exhaustion
Heat exhaustion is the body’s response to an excessive loss of water and salt, usually through excessive sweating, the CDC said. Signs and symptoms include:
Headache
Nausea
Dizziness
Weakness
Irritability
Thirst
Heavy sweating
Elevated body temperature
Decreased urine output
What to do:
Take the person to a clinic or emergency room for medical evaluation and treatment
Call 911 if medical care is unavailable
Have someone stay with the person until help arrives
Remove the person from the hot area
Remove unnecessary clothing, including shoes and socks
Cool the person with cold compresses or have the them wash their head, face, and neck with cold water
Encourage frequent sips of cool water
How to stay safe. What do meteorologists recommend when it’s hot outside?
➤ What’s the best temperature to set your air conditioner thermostat?
Drink plenty of fluids
Stay in an air-conditioned room
Stay out of the sunshine
Check on relatives and neighbors.
Young children and pets should never be left unattended in vehicles under any circumstances. Car interiors can reach lethal temperatures in a matter of minutes.
Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening.
Know the signs and symptoms of heat exhaustion and heat stroke.
Wear lightweight and loose fitting clothing when possible.
To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments.
Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 911.
Stay informed. Get weather alerts via text
What’s next?
We will provide weather coverage as conditions warrant to keep you informed and prepared. Download your local site’s app to ensure you’re always connected to the news. And look for our special subscription offers here.
This story has been updated to include new information.