Michigan Severe Extreme Heat Warning | Effective 07/12/2026 11:31

Headline: 
Extreme Heat Warning issued July 12 at 2:31PM EDT until July 13 at 10:00PM EDT by NWS Marquette MI
Event: 
Extreme Heat Warning
Urgency: 
Expected
Effective: 
July 12, 2026 - 11:31am
Expires: 
July 13, 2026 - 5:15am
Description: 
* WHAT...Heat index values from 95 to 102 expected. * WHERE...Baraga, Dickinson, Iron, Marquette, Gogebic, Keweenaw, Northern Houghton, Ontonagon, and Southern Houghton Counties. * WHEN...For the Heat Advisory, until 9 PM EDT /8 PM CDT/ this evening. For the Extreme Heat Warning, from noon EDT /11 AM CDT/ to 10 PM EDT /9 PM CDT/ Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.
Instruction: 
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. 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. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.
Area Description: 
Keweenaw; Ontonagon; Houghton; Baraga; Marquette; Gogebic; Iron; Dickinson; Southern Houghton
Forcast Office: 
NWS Marquette MI