Heat Advisory issued June 16 at 8:46PM EDT expiring June 17 at 8:00PM EDT in effect for: Berrien, Branch, Cass, Hillsdale, Saint Joseph
Heat Advisory issued June 16 at 3:00PM EDT expiring June 18 at 12:00AM EDT in effect for: Bay, Genesee, Huron, Lapeer, Lenawee, Livingston, Macomb, Midland, Monroe, Oakland, Saginaw, Saint Clair, Sanilac, Shiawassee, Tuscola, Washtenaw, Wayne
Heat Advisory issued June 16 at 2:31PM EDT expiring June 17 at 8:00PM EDT in effect for: Allegan, Barry, Calhoun, Clare, Clinton, Eaton, Gratiot, Ingham, Ionia, Isabella, Jackson, Kalamazoo, Kent, Lake, Mason, Mecosta, Montcalm, Muskegon, Newaygo, Oceana, Osceola, Ottawa, Van Buren
There doesn't seem to be an official definition for a "mass shooting" in the United States, but according to the Gun Violence Archive, a mass shooting is described as four or more individuals being shot or killed in the same general time and location.
The FBI defines a "mass killing" as the killing of three or more people in a public place, but the federal agency also defines a "mass murderer" as someone who has killed four or more people in the same location.
The Gun Violence Archive lists itself as a not-for-profit organization that documents gun violence and gun crime nationally.