The City of Philadelphia's Department of Public Health has declared a heat health emergency that will be in effect starting Sunday at noon and lasting until Wednesday at 8 p.m. The emergency could be extended if next week's forecast takes a turn for the worse and the heat wave continues.

Michiana’s First heat wave of 2025 ramps up today and lingers into most of next week as a dome of high pressure sits right over the Midwest and Great Lakes. Afternoon high temperatures will approach record highs with heat index values of 100° to 105°.