Monday is a NEXT Weather Alert day in the Philadelphia region for tropical downpours and an elevated flash flood risk. As a cold front approaches the area, widespread showers and storms will develop in the afternoon, evening and overnight hours. Any storm could train over the same areas for an hour or more.

Storms bringing heavy rain and flooding are moving through the Philly region Monday afternoon through early Tuesday morning. Get live updates.

The deluge caused a ground stop for about an hour at PHL. The issues from the storm snowballed to cause problems for passengers on Tuesday.

A water main break sent brown water gushing through a North Philadelphia neighborhood Monday morning, filling roadways and sidewalks. At least 50 properties were without water due to the break, but service has since been restored.

A Flood Watch is in effect in parts of New Jersey and Pennsylvania, with potential flash flooding from heavy rains.

FLOODED ROADSA band of over 3" of rain over a short period of time has fallen along Route 1 through southern Chester and Delaware Counties leading to numerous reports of flooded roadways and stranded vehicles. Avoid driving in this area. Flash flood warnings are in effect. pic.twitter.com/dh9TXhNN1c

As crews search for missing people after flash floods killed at least 120 in Texas, cities across the U.S. grapple with rising flood waters.

A flash flood warning was issued by the National Weather Service on Monday at 2:19 p.m. in effect until 6:30 p.m. for Delaware and Philadelphia counties.

Over 3,400 residential properties in Philadelphia are covered by flood insurance policies through the National Flood Insurance Program, which provides most flood insurance nationwide. For single-family homes, including rowhouses, the median annual cost is currently $870, according to FEMA. Some homeowners, like Anita Barnes, pay much more.

Garnet Valley High School is recovering from significant flood damage after a powerful thunderstorm hit Delaware County, Pennsylvania, last week. Wednesday's storm left multiple areas of the building under water and disrupted several summer programs.