EL NIÑO CONTINUES TO STRENGTHEN TOWARD RECORD TERRITORY TWO MONTHS INTO THE ATLANTIC HURRICANE SEASONMonday flash flood threat. (FOX Weather)Also, Level 2 out of 4 flash flood threat is in place for cities including Philadelphia and New York City. next Image 1 of 6prev next Image 2 of 6prev next Image 3 of 6prev next Image 4 of 6prev next Image 5 of 6prev Image 6 of 6The biggest concern with this setup is more heavy rain. A Level 1 out of 4 flash flood threat is in place for both Tuesday and Wednesday. Flash flood threat in the East this week.