Sunday will be another scorcher with a stray shower or storm possible

ByTravis Herzog, David Tillman, Elita Loresca, Kevin Roth, and Elyse Smith KTRK logo

Sunday, August 23, 2026 12:33PM

Small chance for big storms Saturday as triple-digit heat continues

Houston hit 101° Friday, and it will only get hotter this weekend. A weak front next week could bring some relief with higher rain chances.

HOUSTON, Texas (KTRK) -- Houston hit 103 Saturday, and I don't see any reason why we wouldn't see a very similar number today. A weak front next week could bring some relief with higher rain chances, but right now they only sit at 30% for Thursday and Friday.

Sunday will be just as hot with a Heat Advisory in effect until 7 p.m. for all of Southeast Texas. The National Weather Service has mentioned that it's likely to keep the Heat Advisory in place through at least Wednesday. High temperatures will be back in the triple digits near 103 degrees with a bright and sunny afternoon. And once again there's the chance for a stray shower or storm to form north of Houston, though most of Southeast Texas will remain dry.

Is there any rain in the forecast?

Yes, but the chances are slim. First up we've got a 20% chance of rain once again for Sunday. Because it will be so hot, if a thunderstorm develops, it could produce wind gusts over 50 mph and possibly turn severe. But just as quickly as these weekend showers and storms develop, they also fizzle and rain out. Next week we have a 30% chance of rain on Thursday and Friday as the heat dome slides back to the west and moisture levels rise. If we gain confidence that the heat dome will slide fairly far to our west, then our rain chances will go higher.

What should I know about the potential for a flash drought?

First, it's important to understand what a flash drought is. This is what we call it when a drought suddenly develops over 1 or 2 weeks of hot, dry weather instead of the usual 1 or 2 months it takes a more typical drought to develop. We are already seeing "abnormally dry" conditions spread across Southeast Texas, and soon moderate drought may return. This means if you want to keep drought-sensitive vegetation alive during this heat wave, you will need to provide the water. You might also consider providing low amounts of water to your home's foundation to help stabilize the soil moisture and prevent movement in the ground that supports your foundation. This is especially important if your soil is mostly composed of clay.

Are there any signs that this hot, dry pattern will break any time soon?

We see a glimmer of hope that the pattern could budge some toward the end of next week, which is why we have an "optimistic" high of "just" 100 and a 30% chance of rain in the forecast by Thursday. Friday looks even better with a high of 98 and a 30% chance of rain. This weather change will be caused by a weak front that could bring more widespread rainfall. For now we are keeping our expectations low until we gain more confidence on the pattern change.

What's happening in the tropics?

We have a few areas of potential development worth keeping an eye on, but as of now there are no immediate threats to Texas. For a more in-depth discussion on what's happening in the tropics, visit our Daily Tropical Update page.