Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Click a location below for detailed forecast.

Last Map Update: Tue, Aug 18, 2026 at 4:14:14 am CDT

Watches, Warnings & Advisories

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National Weather Service Austin/San Antonio, TX

National Weather Service Houston/Galveston, TX

National Weather Service Lake Charles, LA

Extreme Heat Warning

Heat Advisory

Hazardous Weather Outlook

Extreme Heat Warning & Heat Advisory

A Hot and Dry Tuesday

Heat Persists This Week

Rainfall Deficit across the Region

Extreme Heat Safety

An Extreme Heat Warning is in effect from noon through 8pm Tuesday for North Texas, where afternoon high temperatures of 108 degrees can be expected. A Heat Advisory remains in effect through 8pm Tuesday across Central Texas, where afternoon high temperatures up to 105 degrees can be expected. Remember to drink plenty of water, to take frequent breaks in the shade or A/C, and to look before you lock your vehicle!

Sunny and dry conditions associated with strong high pressure overhead will bring triple-digit temperatures across the entire area today. Remember to stay hydrated and keep cool. To help prevent grass fires, avoid outdoor burning and do not discard lit cigarette butts outside.

Unseasonably hot temperatures are expected to continue, with heat indices consistently in the 103-109 range. With minimal precipitation upcoming, this hot, dry pattern will continue and may result in increased grass fire activity.

After a wet June, the region entered a dry period. Most locations have seen below-normal rainfall over the last 30 days (indicated by the yellow to red colors on the map). Drought conditions will likely worsen IF we don't see significant rainfall in the weeks ahead.

Extreme heat is expected this week. Everyone is at risk from the dangers of extreme heat, but these groups are more vulnerable than most. Ensure that your loved ones and neighbors are safe from the heat and remain Weather-Ready. weather.gov/safety/heat-during