— Scientists say the polar vortex could create an unprecedented and dangerous flood of water in the Northeast.
The National Weather Service issued an advisory for areas of high rainfall and storm surge, which is a danger of an intense flood and could cause flooding.
In addition, severe thunderstorms could cause damaging wind gusts to travel upriver.
“If the severe thunderstorm occurs on or around Wednesday, that would be a very serious storm, and that would also be a risk for the coast,” said Kevin Zwilling, the meteorologist for the National Weather Services in Portland.
The NWS has issued a mandatory evacuation for more than 2,500 people in the Portland metro area.
The NWS says most residents are safe, but those who have moved in are encouraged to stay home.
Meanwhile, the National Guard is assisting with the evacuation effort.
The Guard said in a statement Thursday morning that its members have been providing transportation, communications and disaster preparedness for evacuees.
The National Weather service has also issued a flood warning for coastal areas in the New England region.
The storm could bring damaging winds and storm surges.
A storm surge of 3 feet or more is possible in parts of the Northeast, including New York, New Jersey and Connecticut, according to the NWS.