Southeastern Michigan

Metro Detroit will experience mostly sunny and warm weather on Sunday before a heat wave brings temperatures into the 90s for much of next week. High-pressure systems will drive the heat, with potential for thunderstorms later in the following week as the pressure breaks down.

Metro Detroit faces extreme heat with heat index values exceeding 100° on Friday, alongside a risk of strong to severe thunderstorms in the afternoon and evening. The National Weather Service has issued an Extreme Heat Warning for most of the region until Thursday night and a Heat Advisory for Sanilac County until Friday night, with high temperatures in the 90s and elevated humidity. Severe weather risks include damaging winds, large hail, and heavy rainfall.

More than 150 cases of Cyclosporiasis have been reported in Southeastern Michigan since June 22, with no identified source. The Michigan Department of Health and Human Services (MDHHS) confirms the outbreak, which affects multiple counties, and notes the infection is spread by contaminated food or water, not person-to-person.

Southeastern Michigan communities, including Detroit and Westland, have announced cooling centers and adjusted hours for public facilities to address extreme heat with temperatures exceeding 90°F and a heat index over 100°F.

Metro Detroit will experience warmer weather this weekend, with temperatures rising into the 80s, followed by an extreme heat wave next week with highs in the upper 90s to lower 100s and a heat index up to 110. A 4Warn Weather Alert has been declared for the dangerous heat, which could break the last 100°F record set in 2012.