Updated 28 mins ago What to Know Expect more hot and humid conditions Wednesday ahead of more storms that bring a flooding threat to parts of the Philadelphia region. A First Alert will be in effect from 2 p.m. to 10 p.m. Wednesday. How quickly the storms move through depends on how bad the flooding will be. Strong storms slammed parts of the region on Tuesday, causing flash flooding, damage and water rescues in Chester County, Pennsylvania. And, more storms are expected on a hot and humid Wednesday. Download our mobile app for iOS to get alerts for local breaking news and weather.