Dallas/ Weather & Environment

Dallas Roasts in 106-Degree Heat Wave as Ozone Alert Grips DFW

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Published on August 17, 2026
Dallas Roasts in 106-Degree Heat Wave as Ozone Alert Grips DFWSource: IcedCowboyCoffee, CC0, via Wikimedia Commons

Dallas is starting today with clear skies and temperatures already in the 80s, but the real heat is still charging in. The forecast calls for a sunny high near 106 degrees, with heat index values reaching roughly 106 to 107 and a Heat Advisory in effect through 8 p.m.

Triple-Digit Heat Sticks Around

Southwest winds will remain light near 5 mph as temperatures climb past 100 degrees during the afternoon. Tonight will stay mostly clear, but the low near 82 may not feel especially refreshing, with overnight heat index values as high as 104.

Tomorrow is expected to be nearly as hot, with another 106-degree high and heat index values up to 107. Wednesday should reach 105, followed by highs near 104 Thursday, 103 Friday, 102 Saturday and 103 next Sunday.

Little Rain And An Ozone Alert

Rain chances remain close to zero across Dallas through the weekend, so there is little help coming from clouds or showers. The National Weather Service also says low humidity could contribute to increased wildfire activity early this week, although light winds may limit how quickly fires spread.

Monday is also an Ozone Action Day for the Dallas-Fort Worth area, meaning residents should consider sharing rides, avoiding drive-through lines and limiting other activities that add pollution during the hottest part of the day. People spending time outside should drink water, wear loose, lightweight clothing and take frequent breaks in shade or air conditioning.

Where Dallas Residents Can Cool Down

The City of Dallas says residents seeking temporary relief can use public libraries and recreation centers during regular business hours. Designated cooling locations include the West Dallas Multipurpose Center and the Martin Luther King Jr. Community Center, with more details available from the city’s cooling center information.

Heat exhaustion and heat stroke can develop quickly in this kind of weather, especially for older adults, young children, outdoor workers and people with chronic health conditions. Never leave children or pets in a parked vehicle, and call 911 immediately if someone shows signs of heat stroke.

Dallas-Weather & Environment