Philly set a temperature record Wednesday. Expect another Thursday, maybe an all-timer.

The Delaware and Schuylkill Rivers became swimming holes as kids sought relief from the record heat. Absent were the whirring and harrumphing of air conditioners, since almost no one had them in those days. The heat the next few days will bear some differences to that hot spell in April 1941, including the fact that unless every forecast out there is wrong, it’s going to be even hotter. The ...