UPDATE SUNDAY 6 AM: All roads reopened, police say.

SOUTH BRUNSWICK, NJ – While calling it a “deluge” may be a stretch, some six inches of rain fell on the township from 3-7 p.m. Saturday, closing several roads and stranding 20 motorists, according to police.

The storm brought extended heavy downpours to the region around 3 p.m., continuing into the evening.

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As of 10 p.m. Saturday, police said that five inches of rain fell in the first three hours of the storm causing flash flooding in several areas of the township.

Police said that towing companies removed at least 20 vehicles on Route 1, Route 522, Deans Lane, Raymond Road, Route 27 and in the Summerfield development.

Flooding was especially heavy at the Deans Lane underpass of the Northeast Corridor Line, with several feet of water making the road impassible, police said.

Sections of Route 1 between New Road, Plainsboro and into Princeton also experienced flooding and were closed.

Police said that state Department of Transportation engineers believe much of the standing water on Route 1 would not recede until Sunday morning and that the road would be closed until then.

Deans Lane remains closed between Blackhorse Lane and Georges Road, Route 1 north is closed at Ridge Road, Route 1 south is closed just past Raymond Road and Mapleton Road at Plainsboro Township border, police said at 10 p.m.

Flooding was also a problem farther south with West Windsor Township issuing a state of emergency as the Delaware and Raritan Canal washed over roadways in spots.

Cranbury Township, however, fared much better.

“We have weathered the storm to this point without incident. No issues to report other than cresting water on the Petty Rd. Bridge,” Cranbury Chief of Police Rickey Varga said in an email Saturday night. “I understand we are in much better shape than most.”

The Route 1 closures caused heavy traffic and delays on Route 27 south between Promenade Boulevard and Harrison Street in Princeton.

Police ask motorists to use Route 130 and Route 27 for north-south travel as an alternative route.

If the flooding wasn’t enough, Monmouth Junction and Kendall Park fire crews responded to a structure fire on Dahlia Circle, police said.

No injuries were reported in that incident.

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