FIRST ALERT: Severe storm threat diminishing, but heavy rain likely

Radar indicates the squall line is weakening as it exits the region

Keep the umbrella handy as heavy rain lingers in wake of departing storms, the National Weather Service in Mount Holly said.

"The squall line that moved through the area weakened significantly as it passed Philadelphia, and radar shows it is continuing to weaken as it exits the region," the weather service said in a statement.

Storm threat diminishing, but heavy rain still possible

Showers likely to persist through evening

While the threat of severe weather has diminished, the weather service said, heavy rain is still possible, with showers likely to persist through the evening.

The service said the rain is expected to become more scattered overnight, with a chance of showers lingering into Tuesday morning.

But the severe weather threat has passed.

"The line of showers and storms continues to race eastward across New Jersey," the service said. "The severe threat has ended, but heavy downpours will continue to be possible with this line of storms over the next hour or so."

Flash Flood Warning for parts of Bucks, Montgomery counties

Residents urged to avoid flooded areas

The weather service also issued a Flash Flood Warning for parts of Bucks and Montgomery counties until 9:15 p.m. Monday, warning of potential flooding in low-lying areas, roads and underpasses.

Residents are urged to avoid flooded areas.

What to do if you encounter flooding

• Turn around, don't drown. Never drive through flooded areas.
• If you must walk through floodwaters, use a sturdy stick to help you keep your balance.
• Be aware of downed power lines and other hazards.
• If you are in a building that is flooding, move to higher ground.
• If you are caught in a flash flood, try to climb to higher ground or find a sturdy object to hold onto.
• Call 911 if you need help.