National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Extreme Heat Across the Southern U.S.; Flash Flooding Threats in the Mid-Atlantic, Northeast, and Four Corners Region

Dangerous and extreme heat will remain across portions of the southern U.S. this week. Heavy rainfall may bring significant flash flooding across portions of the Mid-Atlantic and Northeast through the night, and additional flash flooding concerns across New England on Wednesday. Monsoonal thunderstorms will bring a flash flood risk to the Four Corners region, especially in burn scar areas Read More >

Hazardous Weather Conditions

Current conditions at

Rockwall Municipal Airport (KF46)

Lat: 32.93°NLon: 96.43°WElev: 564ft.

Fair

85°F

29°C

Humidity 64%
Wind Speed S 7 mph
Barometer 29.87 in
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 29 Jul 12:35 am CDT
Extended Forecast for

Sachse TX

Heat Advisory July 29, 12:46am until July 29, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 29, 12:46am until July 29, 08:00pm

    NOW until 8:00pm Wed

    Heat Advisory

  • Overnight

    Low: 79 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 100. Heat index values as high as 110. Southwest wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 79. South southeast wind 5 to 10 mph.

    Low: 79 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 100. Heat index values as high as 110. South wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 80. South southeast wind 5 to 10 mph.

    Low: 80 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny and hot, with a high near 102. Southwest wind around 10 mph.

    High: 102 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 81. South southwest wind 5 to 10 mph.

    Low: 81 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 99. West wind 10 to 15 mph becoming north in the morning. Winds could gust as high as 20 mph.

    High: 99 °F

    Hot

Detailed Forecast

Overnight
Mostly clear, with a low around 79. South wind around 5 mph.
Wednesday
Mostly sunny and hot, with a high near 100. Heat index values as high as 110. Southwest wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 79. South southeast wind 5 to 10 mph.
Thursday
Sunny and hot, with a high near 100. Heat index values as high as 110. South wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 80. South southeast wind 5 to 10 mph.
Friday
Mostly sunny and hot, with a high near 102. Southwest wind around 10 mph.
Friday Night
Mostly clear, with a low around 81. South southwest wind 5 to 10 mph.
Saturday
Sunny and hot, with a high near 99. West wind 10 to 15 mph becoming north in the morning. Winds could gust as high as 20 mph.
Saturday Night
Mostly clear, with a low around 73. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 95.
Sunday Night
Mostly clear, with a low around 74.
Monday
Sunny, with a high near 97.
Monday Night
Mostly clear, with a low around 76.
Tuesday
Sunny and hot, with a high near 99.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sachse TX
 32.99°N 96.59°W (Elev. 548 ft)
Last Update:
6:11 pm CDT Jul 28, 2026
Forecast Valid:
12am CDT Jul 29, 2026-6pm CDT Aug 4, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation