Flash flood warnings are in effect in parts of Massachusetts as the remnants of Hurricane Ida move through Southern New England. A tornado watch was in effect for the Cape and Islands through 7 a.m. Thursday, forecasters said.
Flash flood warnings continued for communities in Cape Cod, Worcester, Milford, Springfield, Lowell, and Haverhill until 8:30 a.m. Around Boston, flash flooding warnings will be in effect until 9 a.m., forecasters said.
Flash floods occur within a few minutes or hours of excessive rainfall and their force can move cars, tear out trees, and destroy buildings and bridges. As of midnight, forecasters said around 1 inch of rain had fallen in the Boston area.
Forecasters say 4 to 6 inches of rain is expected to hit Connecticut, Rhode Island, and portions of central Massachusetts, as the already rain-soaked region braces for another round of heavy precipitation.
The heaviest rain is forecast to fall across Connecticut, Southeastern Massachusetts, and Rhode Island.
The remnants of Ida were expected to bring up to 6 inches of rain to Boston Wednesday night into Thursday morning. The majority of the Cape is forecasted to receive less rain, with 3 to 4 inches possible.
The flash flood watch took effect at 2 p.m. Wednesday and will extend until 2 p.m. on Thursday, according to the weather service.
Forecasters are warning of rare, high-impact flooding into Thursday morning which may flood basements and wash out roads.
“Severe, widespread flash flooding is expected with Ida. Areas that normally do not experience flash flooding will flood,” wrote the National Weather Service.
The National Weather Service is encouraging people to avoid driving at night when it is difficult to see flooded roads.
If you are caught driving on a flooded road and waters are rising rapidly around you, get out of the car quickly and move to higher ground. Most cars can be swept away by less than 2 feet of moving water.
The state of Massachusetts recommends that during a flash flood watch, residents should keep up to date with the latest information on weather conditions, tie down outdoor objects, and be prepared to move to higher ground.