Heavy rain continues to cause dangerous flooding across eastern New York as the storm system slowly moves toward New England. Authorities have issued multiple flash flood warnings after torrential rainfall flooded roads, stranded vehicles, and prompted water rescues.

More than 6 inches of rain fell in parts of the Hudson Valley, with Schodack recording 9.22 inches. That is more than twice the area’s average rainfall for the entire month of July. Albany International Airport received more than 5 inches of rain since Tuesday, making it one of the city’s largest two-day rainfall events on record.

New York officials declared a state of emergency in Columbia County, just south of Albany. Local authorities said floodwaters covered many local, county, and state roads and urged residents to stay off the roads unless absolutely necessary. Video from Guilderland showed several vehicles trapped in deep floodwater. One man was seen carrying a child to safety while helping another person walk through waist-deep water.

More than 11 million people remain under flood watches across eastern New York and western New England. The highest flood risk covers parts of eastern New York, Massachusetts, Vermont, and Connecticut. Forecasters expect heavy rain to spread into eastern Massachusetts, including Boston, later on Wednesday.

The storm also caused flooding across New Jersey and Pennsylvania before moving northeast. Northern New Jersey received between 2 and 5 inches of rain. In Paterson, firefighters rescued at least 20 people from floodwaters, including one person stranded in a wheelchair. Rescue crews in Coalport, Pennsylvania, also saved three people and two dogs from a flooded home.

Travel has also been disrupted. By early Wednesday, about 200 flights had been canceled and dozens delayed at LaGuardia Airport, John F. Kennedy International Airport, and Newark Liberty International Airport. Boston Logan International Airport also reported more than 30 flight cancellations and numerous delays.

Forecasters expect the heaviest rain to continue through Wednesday afternoon, with rainfall rates reaching 1 to 2 inches per hour in some areas. The storm is expected to weaken by Wednesday evening, reducing the threat of widespread flooding. However, isolated heavy showers could still affect parts of coastal New England, including areas from Boston to coastal Maine, on Thursday.