Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

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Last Map Update: Tue, Aug 18, 2026 at 11:26:47 pm 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

Wednesday: Extreme Heat Warning & Heat Advisory

Hot and Dry Tuesday Continues

High and Dry this Weekend

Extreme Heat Safety

An Extreme Heat Warning remains in effect through 8pm Wednesday for North Texas, where afternoon high temperatures up to 108 degrees can be expected. A Heat Advisory remains in effect through 8pm Tuesday across Central Texas, where afternoon heat indices up to 109 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 will continue, with widespread triple-digit temperatures across North and Central Texas expected into the evening tonight. Remember to drink plenty of water, take frequent breaks in shaded or air-conditioned areas, and NEVER leave kids or pets unattended in vehicles!

Unseasonably hot temperatures will continue, with heat indices consistently in the 105-109 range. With little to no rain chances upcoming, hot and dry conditions are not expected to ease anytime soon.

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