New York and New Jersey hit by torrential rain and flash floods, forcing highway closures, suspending subway lines and flight delays.

Dozens of flash flood warnings are in effect for millions across several states and major cities in the Northeast, as slow-moving summer storms impact the East Coast Monday evening.

Dangerous and destructive flash flooding and rises on area rivers are anticipated as inches of rain pour down from midweek to this weekend, with the apex likely to be in Louisiana and western Mississ...