Photos: September flooding in N.J. 19 Gallery: Photos: September flooding in N.J.

MERCER COUNTY -- Traffic in the Mercer County area surrounding Trenton gridlocked this morning from road closures due to heavy overnight rains and another portion of Route 29 suffered a partial collapse in Ewing.

Trenton's Island and Glen Afton sections, still cleaning up from Hurricane Irene flooding, were evacuated again as flood water surged from the Delaware river, authorities said.

Traffic jammed for miles on Route 195 westbound during the morning commute after authorities were forced to shut Route 29 where it meets with the highway and divert all traffic onto Route 129. Additional flooding on Route 1 near Perry street and in Lawrence jammed traffic throughout the area.

The shoulder of Route 29 just north of Scenic Drive in Ewing eroded from flooding and workers were surveying the damage this morning while the road remained closed.

Lambertville has also been hit hard once again by the rising Delaware River as residents watched recently pumped out basements fill with water. The bridge between Lambertville and New Hope, Pa. has been closed due to the rising river and floating debris.

MORE COVERAGE:

• Forecasters say flooding could exceed levels last seen during a hurricane 40 years ago

• Hightstown residents say flooding could become regular problem from NJ Turnpike construction

• Flooding leads to evacuation of 100K people in Pa.

• Check the latest hydrology reports for river flooding from the National Weather Service

HURRICANE IRENE FLOODING PHOTOS

Photos: Mercer County flooding from Hurricane Irene 58 Gallery: Photos: Mercer County flooding from Hurricane Irene

The Delaware River in Trenton is already at 23 feet, which is considered moderate flood stage, according to the National Weather Service. The current forecast calls for the river to crest at 24 feet at 8 p.m., though heavy rain continues to pound the Mercer County area. Flood stage is 20 feet.

The Island and Glen Afton sections of the Trenton remain under a mandatory evacuation order this morning.

While most of the Island streets are under at least two feet of water are impassable, officials are preparing for more water in Glen Afton and demanding that residents leave their homes and take their cars with them.

At 11 a.m. on the island, a massive police and fire presence was coordinating evacuations by bus and boat, which police said had mostly concluded.

Towers were brought in to take out the cars from the streets.

Swift water rescue, police, and other responders are going door to door, telling residents they have to leave.

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