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HomeWeather news → NWS Jacksonville Issues Extreme Heat Warning for Portions of Florida and Georgia
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NWS Jacksonville Issues Extreme Heat Warning for Portions of Florida and Georgia

August 18, 2026 · wweather1 editorial · 1 min read

The National Weather Service in Jacksonville, Florida, has issued an Extreme Heat Warning for parts of northeast and north central Florida, as well as portions of southeast Georgia.

The warning was issued on August 18 at 12:50 AM EDT and remains in effect until August 18 at 8:00 PM EDT. Dangerously hot conditions are expected, with heat index values reaching up to 115.

Impacts from the event include a significant increase in heat-related illnesses due to the extreme heat and high humidity.

Affected areas include Suwannee, Baker, Inland Nassau, Union, Bradford, Gilchrist, Inland Flagler, Eastern Hamilton, Coastal Nassau, Coastal Duval, Eastern Clay, Eastern Alachua, Eastern Putnam, Coastal Flagler, Eastern Marion, Western Hamilton, Trout River, Western Clay, Northeast Coastal St. Johns, Western Alachua, and Western portions.

Why it is dangerous and what to do

⚠️ Safety
• Drink plenty of fluids and stay in an air-conditioned room.
• Stay out of the sun and check up on relatives and neighbors.
• Wear lightweight and loose-fitting clothing and limit strenuous activities to early morning or evening.
• Schedule frequent rest breaks in shaded or air-conditioned environments during outdoor work.
📊 The numbers, from wweather1 data
Jacksonville: now +26°, Clear.
That is 7° above the August climate norm.
The record for this date is +36° (1954).
Three-day forecast: 18 August: +38°/+25° · 19 August: +40°/+27° · 20 August: +40°/+27°
The figures are computed automatically from the Open-Meteo/ERA5 archive — no eyeball estimates.

🌍 Weather in nearby cities

📰 Data source: NWS. Forecast and analysis — wweather1, based on Open-Meteo / met.no data.

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