Severe Expected Likely Extreme Heat Warning Extreme Heat Warning issued June 29 at 2:00PM CDT until June 30 at 12:00AM CDT by NWS Twin Cities/Chanhassen MN Jun 29, 2:00 PM → Jun 30, 12:00 AM WHAT: For the Extreme Heat Warning, dangerously hot conditionswith heat index values up to 110. For the Heat Advisory, heat indexvalues up to 100 expected. WHERE: Portions of central, east central, south central, andsoutheast Minnesota and northwest and west central Wisconsin. WHEN: For the Extreme Heat Warning, until midnight CDT tonight.For the Heat Advisory, from midnight tonight to 9 PM CDT Tuesday. IMPACTS: Heat-related illnesses increase significantly duringextreme heat and high humidity events. Hot temperatures and highhumidity may cause heat illnesses. + Read More Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Updated: Jun 29, 8:13 PM Source: NWS Alert