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Extreme Heat Warning Issued for Portions of North and South Carolina

August 18, 2026 · wweather1 editorial · 1 min read

The National Weather Service in Wilmington, North Carolina, has issued an Extreme Heat Warning for parts of southeast North Carolina and northeast South Carolina for August 18. Heat index values are expected to reach up to 113 degrees between 11:00 AM and 8:00 PM EDT.

The alert was issued by NWS Wilmington NC at 2:35 AM EDT on August 18. The warning covers the period from 11:00 AM EDT to 8:00 PM EDT as elevated humidity and high temperatures affect the region.

In southeast North Carolina, the warning applies to Columbus, Inland Pender, Coastal Pender, Inland New Hanover, Coastal New Hanover, Inland Brunswick, and Coastal Brunswick. In northeast South Carolina, affected areas include Williamsburg, Coastal Horry, Inland Georgetown, Coastal Georgetown, Central Horry, and Northern Horry.

According to the National Weather Service, dangerously hot conditions are anticipated, with heat index values potentially reaching 113. Officials note that heat-related illnesses increase significantly during events marked by extreme heat and high humidity.

Why it is dangerous and what to do

⚠️ Safety
• Drink plenty of fluids.
• Stay in an air-conditioned room.
• Stay out of the sun.
• Check up on relatives and neighbors.
📊 The numbers, from wweather1 data
Myrtle Beach: now +26°, Clear.
That is 4° above the August climate norm.
The record for this date is +34° (1995).
Three-day forecast: 18 August: +33°/+26° · 19 August: +35°/+27° · 20 August: +35°/+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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