In the Lehigh Valley, 22 out of just the last 30 days have seen dew points at or above 70, meaning nearly three-quarters of recent days have been sticky enough to feel more like Florida than eastern Pennsylvania.
The National Weather Service issued a flash flood warning for the Allentown, Bethlehem and Easton areas until 9:30 p.m. In the Emmaus area, more than 2 inches of rain had fallen in two hours, a meteorologist said.
Experts say there’s confusion about how quickly heat and moisture can compromise everyday medicines like insulin, inhalers, blood thinners and common antibiotics.
The National Weather Service has issued a flood watch for Lehigh and Northampton counties — along with much of eastern Pennsylvania and parts of New Jersey — from Monday afternoon through the evening.
A cold front colliding with a surge of tropical moisture is expected to produce widespread showers and storms, triggering a flood watch for the Lehigh Valley and much of eastern Pennsylvania.