It’s about to be dangerously hot, meteorologists warn.
An extreme heat warning and a heat advisory were issued by the National Weather Service in Melbourne at 1:05 a.m. on Tuesday, July 29.
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The extreme heat warning applies to inland Volusia, northern Lake, Orange, Seminole, Coastal Volusia and southern Lake counties. The heat index could range from 112 to 115 today, with temps from 95 to 100.
The heat advisory applies to Brevard, Okeechobee, Indian River, St. Lucie and Martin counties. The heat index could range from 108 to 112 today, with temps from 93 to 99.
Extreme heat warning issued for east central Florida
Extreme heat warning and heat advisory issued for east central Florida July 29, 2025.
At 1:05 a.m., the NWS issued a statement saying dangerously hot conditions with heat index values reaching as high as 115 are expected.
There’s a major to extreme heat risk for Volusia, Lake, Orange, Seminole and Osceola counties (including the greater Orlando area), from noon to 7 p.m. ET Tuesday, July 29.
Temperatures are expected to range from 95 to 100 degrees, with a heat index between 112 and 115.
Extreme heat warning issued when dangerous heat is happening or about to happen
The National Weather Service renamed excessive heat watches and excessive heat warnings to extreme heat watches and warnings, effective March 4, 2025.
“An extreme heat warning is issued when extremely dangerous heat conditions are expected or occurring,” the National Weather Service said.
When is an extreme heat warning issued in Florida?
There are slight differences around the state on when extreme heat warnings are issued:
Western Panhandle: This is issued if the heat index is expected to reach 113 degrees or higher over the next 12 to 24 hours or the air temperature is expected to hit 105 degrees.
Central Panhandle, North Florida: This is issued is the heat index is expected to reach 113 degrees or the air temperatures is forecast to reach 105 degrees within the next 6 to 24 hours.
Northeast Florida: This is issued if the heat index is expected to be 113 degrees within the next 12 to 24 hours.
East Central Florida: This is issued if a heat index of 113 degrees is expected in the next 24 hours.
In South Florida: This is issued if there is certainty the heat index will hit 113 degrees for two hours or longer.
Southwest, West Central Florida: This is issued if the heat index is expected to reach 113 degrees or the air temperature is forecast to reach 105 degrees within the next 24 hours.
What should you do when there is an extreme heat warning?
“Avoid 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,” the National Weather Service said.
“Stay indoors in an air-conditioned space as much as possible, including overnight. Check on family and neighbors,” especially children, the elderly and pets.
➤ What’s the best temperature to set your air conditioner thermostat?
Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 911.
What you should do under extreme heat conditions:
Stay in an air-conditioned room
Check on relatives and neighbors.
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.
➤ Heat exhaustion, heat stroke in Florida: Symptoms, what to do, when to call 911
Heat advisory issued for east central Florida
A heat advisory was issued for five counties along Florida’s east coast: Brevard, Okeechobee, Indian River, St. Lucie and Martin counties. The heat advisory is in effect from noon until 7 p.m.
Temperatures could range from 93 to 99 degrees Tuesday, July 29, with a heat index between 108 and 112.
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.
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
Central Panhandle, North Florida: 108 to 112 within the next 6 to 24 hours or air temperature is forecast to reach 103 degrees
Northeast Florida: 108-112 degrees
East Central Florida: 108 to 112 degrees
In South Florida: 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.
What should you do when there is a heat advisory?
“Residents are advised to consider postponing or rescheduling outdoor activities, especially during the heat of the day,” the National Weather Service said.
“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.”
See latest weather alerts, warnings issued in Florida
Heat index and temperature map for US, Florida
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.
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This weather report was generated automatically using information from the National Weather Service and a story written and reviewed by an editor.
This article originally appeared on The Daytona Beach News-Journal: Extreme heat warning issued for Daytona Beach, Florida. Heat advisory