Extreme Heat Warning

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service Phoenix AZ Issued by National Weather Service Tucson AZ 107 PM MST Thu Mar 19 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST SUNDAY... * WHAT...Dangerously hot conditions. Afternoon temperatures 97 to 108 expected. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * WHERE...Portions of south central and southwest Arizona. * WHEN...Until 8 PM MST Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Afternoon temperatures 97 to 108 expected. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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.