Get prepared for heat on Tuesday and Wednesday.
Forecasters are predicting highs in the low 90s on both Tuesday and Wednesday in Pennsylvania.
Temperatures will begin to creep down Thursday, with a high expected in the upper 80s. On Friday, the high is expected to hover in the 80s, with 70-degree temperatures returning for the weekend.
In the Philadelphia region, the forecast for the first day of summer, which is Friday, is partly cloudy and highs in the mid 80s.