Flash flooding is weather’s No. 2 killer, claiming more lives than anything but heat, so it’s important to understand what causes it and how to stay safe.

If there’s a “flash flood watch,” according to the service, flooding is not guaranteed, but conditions are favorable enough for it to be possible, so be prepared to change your plans.

Let's start with the basics: Flash flooding occurs when heavy amounts of rain falls in a short period of time -- usually less than 6 hours. Typically, the rainfall rates are 0.5-1.0 inches per ...

At 4:11 p.m. on Wednesday, the National Weather Service issued an updated flash flood warning in effect until 7:30 p.m. for Middlesex, Monmouth, Morris and Somerset counties.

On Thursday at 6:39 a.m. a flash flood warning was issued by the National Weather Service in effect until 9:45 a.m. for Adams, Cumberland and York counties.