In parts of Connecticut on Sunday, flooding of historic proportions closed roads, required rescue efforts and caused mudslides.

The National Weather Service issued a flash flood warning, saying Fairfield and New Haven counties were at risk of catastrophic flooding through the evening.

Southbury police urged residents in a Facebook post to stay home while roads are closed and emergency crews respond to emergencies. In nearby Danbury, city officials said in a statement that a landslide had forced the evacuation of a home.

Some parts of Connecticut, including Woodbury, saw more than six inches of rain in a matter of hours. Emergency crews had to rescue several vehicles that were overwhelmed by the high water levels on the roads. Drivers were seen evacuating cars that were floating on the roads.

Firefighters in Munroe are asking residents to avoid the roads unless they are on flood rescue missions in Monroe. Firefighters say the Stevenson section has been particularly hard hit.

Flash flood warnings were also issued for parts of southeastern New York state, and flash flood warnings and advisories were in effect for areas of Delaware, New Jersey and southeastern Pennsylvania. Meteorologists also warned of flooding in low-lying areas.