Surviving the Scorching Texas Heat Wave.

Dallas is under an excessive heat warning due to rising temperatures, record-breaking humidity, and high dew point. The National Weather Service warns that the heat wave is expected to last until at least 8 p.m. on Wednesday. High heat levels can cause dehydration, heat exhaustion, and heat stroke. The NWS advises residents to take active safety precautions, including drinking water, paying attention to weather alerts, and staying indoors whenever possible. Dallas also has "Beat the Heat" cooling centers available throughout the city that will open to the public beginning June 27.