Heavy Rainfall Continues in Hawaii; Severe Thunderstorms and Heavy Rainfall in the Plains and Southern Appalachians

Areas of gusty winds, heavy rain leading to flash flooding, and high surf continue across portions of Hawaii as Tropical Storm Lala continues to move away from the islands. Severe thunderstorms and heavy rainfall will shift into the southern Appalachians today. Strong to severe thunderstorms may produce large hail, scattered wind gusts, and heavy rain today across the northern and central Plains. Read More >

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Last Map Update: Mon, Aug 17, 2026 at 12:18:21 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

Air Quality Alert

Hazardous Weather Outlook

Heat Advisory Today

Today & Tomorrow

Heat Continues This Week

Rainfall Deficit across the Region

Climatologically, It Gets Cooler From Here

Recognize Heat Related Illness Symptoms

A Heat Advisory remains in effect for most of North, Central, and East TX through 8 pm this evening. Heat index values up to 107 degrees are expected, with actual temperatures between 99 to 105 degrees. Drink plenty of water, and limit time spent outdoors during the hottest time of the day!

Widespread triple digit highs will continue with highs mostly in the 100-106 both today and tomorrow. The humidity values will remain fairly low, keeping the heat index values near or just slightly above the temperatures. A few storms may clip some of our northern counties late this afternoon, but chances are only 10% or less. Remember to stay hydrated and to take frequent breaks in shaded or cooled areas! We will have another dry and very hot day (Sunday) with highs in the upper 90s to 105° and heat index values of 101° to 107°. Remember to stay hydrated and to take frequent breaks in shaded or cooled areas!

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 through at least the first half of the week.

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.

While we are expecting possibly the warmest temperatures of the year this week, the average temperature peaks in early-mid August. The average temperature is now on a downward trend for the rest of the year. The average last 100 degree day is in late August for both DFW and Waco, with the latest ever 100 degree days being recorded in October for both sites.

Recognize heat related illness symptoms by knowing what happens to the body when exposed to extended periods of hot temperatures. Act fast and move to a cooler area and seek medical help if symptoms don't improve.