Heat Advisory
URGENT - WEATHER MESSAGE
National Weather Service Jacksonville FL
1246 AM EDT Fri Aug 21 2026
FLZ021-023-024-030-031-035-120-124-136-220-225-236-322-422-425-522-
GAZ136-152>154-162-163-165-166-264-350-364-212215-
/O.EXA.KJAX.HT.Y.0026.260821T1500Z-260821T2300Z/
Suwannee-Baker-Inland Nassau-Union-Bradford-Gilchrist-Eastern
Hamilton-Coastal Nassau-Eastern Alachua-Western Hamilton-Trout
River-Western Alachua-Northern Columbia-Southeastern Columbia-
Western Duval-Southwestern Columbia-Wayne-Brantley-Inland Glynn-
Coastal Glynn-Echols-Clinch-Inland Camden-Coastal Camden-
Northeastern Charlton-Southern Ware-Western Charlton-
Including the cities of Starke, Suwannee River Station, Newnans Lake,
Winfield, Normandy, Woodbine, Atkinson, Jennings, Jesup,
Waynesville, St. Simons, Hilliard, Oleno State Park, Dungeness,
St. George, Country Club Estate, Fernandina Beach, Statenville,
Macclenny, Blue Springs, Newberry, Amelia City, Doctortown,
Kingsland, Jasper, Homerville, Yulee, Winokur, Ratliff, Raybon, Glynn
Haven, McAlpin, Sea Island, Waverly, Needmore, Race Pond, Dover
Bluff, Watertown, Homeland, Folkston, Olustee, Columbia, Thalmann,
Suwannee Springs, West Lake, High Springs, Kings Ferry, Stephen
Foster State Park, Lulu, Gainesville, Dock Junction, Houston,
Bryceville, Gainesville Airport, Trenton, Belmont, Archer, Jekyll
Island, Newburn, Lake Butler, Hortense, Gardi, Suwannee Valley, Live
Oak, Hickox, Nahunta, Colesburg, Tarboro, White Springs, Hoboken,
Lake City, and New River
1246 AM EDT Fri Aug 21 2026
...HEAT ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 7 PM EDT THIS
EVENING...
* WHAT...Heat index values up to 108 expected.
* WHERE...Portions of northeast and northern Florida and southeast
Georgia.
* WHEN...From 11 AM this morning to 7 PM EDT this evening.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Jacksonville FL
1246 AM EDT Fri Aug 21 2026
FLZ038-125-132-137-138-232-233-237-325-333-433-533-633-212215-
/O.CON.KJAX.HT.Y.0026.260821T1500Z-260821T2300Z/
Inland Flagler-Coastal Duval-Eastern Clay-Eastern Putnam-Coastal
Flagler-Western Clay-Northeast Coastal St. Johns-Western Putnam-
South Central Duval-Southeast Coastal St. Johns-Northern Inland
St. Johns-Southern Inland St. Johns-Western St. Johns-
Including the cities of Middleburg, Palm Valley, Bunnell, Lakeside,
Andalusia, Arlington, Orange Park, Durbin, Picolata, Palatka, Fruit
Cove, Ponte Vedra Beach, Green Cove Springs, Anastasia, Bellair,
Saint Augustine South, Doctors Inlet, Bakersville, Saint Augustine,
Tallyrand, Ortega, Bostwick, Espanola, Oceanway, Saint Augustine
Beach, Jacksonville, Palm Coast, Saint Augustine Shore, Riverside,
Carraway, San Marco, Switzerland, Dupont Center, and Butler Beach
1246 AM EDT Fri Aug 21 2026
...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 7 PM
EDT THIS EVENING...
* WHAT...Heat index values up to 108 expected.
* WHERE...A portion of northeast Florida.
* WHEN...From 11 AM this morning to 7 PM EDT this evening.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
&&
$$
For more information, visit us at www.weather.gov/jax
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