At 1:44 a.m. EDT on Sunday, the National Weather Service issued a heat advisory valid between noon EDT and 9 p.m. EDT for Cass, St. Joseph, Branch, Hillsdale and Berrien counties.

The National Weather Service issued heat advisories for a large swath of the East Coast from central Florida to Virginia through much of the weekend. Highs in the upper 90s F (mid 30s C) were forecast for central Florida,

The NWS has issued a Heat Advisory for Tampa Bay, Florida, with heat index values up to 109, warning of potential heat illnesses and advising precautions.