[REVISION HISTORY]

Southeast US heat and storms Aug-Sept 2026

Updated 8 times since CLSTR started tracking revisions of this situation.

What changed

2026-09-19 20:45 UTC → 2026-09-23 11:52 UTC · added ~~removed~~

Following the extreme heat and unsettled weather of August 2026, the central and southern United States faced renewed volatility in mid-September. A persistent heat dome caused temperatures in several states, including Texas, Oklahoma, Louisiana, Mississippi, Tennessee, North Carolina, and South Carolina, to potentially reach record highs. During the third week of September, more than 50 million people were expected to face major to extreme HeatRisk, with heat index values in Texas, Oklahoma, and Louisiana projected between 105 and 110 degrees. This heat coincided with a cold front expected to trigger powerful thunderstorms across the central U.S., placing over 41 million people across at least 15 states at marginal to slight flood risk. In Georgia, the National Weather Service issued a hazardous weather outlook for north and central regions, forecasting thunderstorms, gusty winds, frequent lightning, and locally heavy rainfall. Heat index values in Georgia were projected to reach between the upper 90s and low 100s through early next ~~week, while patchy dense fog was expected near daybreak in areas recently affected by heavy rain.~~ week. By September 20, north and central Georgia faced a Level 1 severe weather ~~risk for Saturday afternoon and evening.~~ risk. High heat and humidity were expected to drive scattered thunderstorms capable of producing damaging gusty winds up to 60 mph, frequent lightning, dime-sized hail, and locally heavy rainfall. Heavy downpours were anticipated to continue through Sunday ~~morning, with~~ morning. By September 22, heavy rain ~~chances potentially rising to 60% by the following Tuesday.~~ and thunderstorms triggered flash flood warnings across North Georgia, specifically affecting Murray, Gilmer, and Gordon counties. Near Carters Lake, some areas recorded over an inch of rain within a two hours, raising concerns for flooding along U.S. Route 411. Forecasts indicated potential for widespread storms and isolated strong storms under a Level 1 severe weather risk, with further hazardous weather outlooks issued for north and central Georgia for Wednesday.

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