Extreme Heat Warning

Locations Affected

Austin, TX ∙ San Antonio, TX ∙ Round Rock, TX ∙ New Braunfels, TX ∙ Georgetown, TX ∙ Pflugerville, TX ∙ Cedar Park, TX ∙ San Marcos, TX ∙ Oak Hill, TX ∙ Mendoza, TX

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service Austin/San Antonio TX 1253 PM CDT Tue May 13 2025 ...HEAT ADVISORY NOW IN EFFECT UNTIL 1 PM CDT WEDNESDAY... ...EXTREME HEAT WARNING IN EFFECT FROM 1 PM TO 9 PM CDT WEDNESDAY... * WHAT...For the Heat Advisory, air temperatures near 104 degrees, except near 110 along the Rio Grande. For the Extreme Heat Warning, dangerously hot conditions with air temperatures of 105 to 108 degrees, with near 115 degrees along the Rio Grande. * WHERE...A portion of south central Texas. * WHEN...For the Heat Advisory, until 1 PM CDT Wednesday. For the Extreme Heat Warning, from 1 PM to 9 PM CDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

---