Dangerously hot conditions are expected this week, with heat index values forecasted to exceed 105 degrees Tuesday through Thursday. The National Weather Service has issued an Extreme Heat Watch for all of southeast Michigan.
According to the NWS:
URGENT - WEATHER MESSAGE
National Weather Service Detroit/Pontiac MI
128 PM EDT Sun Jun 28 2026
Midland-Bay-Huron-Saginaw-Tuscola-Sanilac-Shiawassee-Genesee-
Lapeer-St. Clair-Livingston-Oakland-Macomb-Washtenaw-Wayne-
Lenawee-Monroe-
Including the cities of Saginaw, Flint, Port Huron, Pontiac,
Adrian, Warren, Bad Axe, Sandusky, Midland, Lapeer, Detroit,
Owosso, Ann Arbor, Caro, Bay City, Howell, and Monroe
...EXTREME HEAT WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH
THURSDAY EVENING...
* WHAT...Dangerously hot conditions with heat index values exceeding 105.
* WHERE...All of southeast Michigan.
* WHEN...From Tuesday afternoon through Thursday evening.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
* ADDITIONAL DETAILS...Heat and humidity build into the region on Monday with heat index values approaching or touching 100 degrees for a short period. The hottest conditions are expected to be Tuesday through at least Thursday. This multi-day stretch will see high temperatures in the mid to upper 90s and possibly 100 degrees across the Detroit metro urban areas. Dewpoints into the low to mid 70s bring heat index values to around 105 degrees or greater each day. Little relief overnight with low temperatures each night in the low to mid 70s.
Stay Safe
Heat-related illnesses can happen when the body isn’t able to cool itself properly. The body normally cools itself by sweating, but during extreme heat, this might not be enough. In these cases, a person’s body temperature rises faster than it can cool itself down. This can cause damage to the brain and other vital organs.
To prevent heat-related cramps, exhaustion, or heat stroke, stay hydrated, limit sun exposure, and remain in air conditioning as much as possible. Please keep a close watch on neighbors and family members. Remember that car interiors can reach dangerous, life-threatening temperatures within minutes, so never leave children or pets unattended in a vehicle.
Residents without air conditioning can cool off in public air-conditioned spaces, such as the Chelsea District Library. A list of cooling sites in the county is available on washtenaw.org.
Visit heat.gov/heat-safety for information on what to watch out for with heat cramps, heat exhaustion, and heat stroke.
