Bethlehem Live Weather Camera

Dangerous heat is expected Monday through Wednesday in the Lehigh Valley, with concerns of excessive rainfall on Thursday before much cooler air arrives.

Excessive humidity and extremely warm temperatures have prompted a heat advisory for the Lehigh Valley on Friday. On top of the heat, there's a risk of severe weather and an unsettled weekend ahead.

Part of Climate Action Campaign’s Extreme Weather Emergency Tour, the event centered on how extreme weather, exacerbated by climate change, has deadly consequences.

The National Weather Service said the next couple of days will feature “the most pleasant weather of the summer" in the Lehigh Valley and surrounding areas.

Lehigh and Northampton counties are again under a flood watch, this time from 3 p.m. Wednesday through 3 a.m. Thursday.

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.

Moisture from Tropical Depression Chantal will bring the chance for scattered showers and downpours to the region, kicking off a stretch of unsettled weather with daily chances for storms throughout the week.

After Monday brought rounds of thunderstorms and heavy rain, more severe weather is expected to target the region on Tuesday, forecasters say.