(CNN) — A huge moisture plume stretching from the eastern Pacific to the east coast of the United States has triggered excessive rainfall in the northeast, while some places are already experiencing flooding.

More than 50 million people are under flood alert through the end of Tuesday in several major cities including Washington, Philadelphia, New York, Boston and Providence, Rhode Island.

-A d-

Since Tuesday morning, millions of people have faced flash flood warnings in parts of Connecticut and Pennsylvania. Which means some places were already flooded.

“Flash flooding is underway or expected to begin shortly,” particularly in the central counties of Middlesex and Haven, the National Weather Service reported.

West Virginia and central Appalachia are also at risk, the Weather Prediction Center said.

a storm system

-A d-

The heavy rains are part of the same storm system that inundated parts of Georgia on Sunday, as well as extreme rains in Appalachia and the Northeast on Monday.

This storm system will create an area of ​​low pressure off the mid-Atlantic coast through Tuesday, bringing heavier showers in the afternoon.

“This will make the area from northern Delaware to southeast New York to southern New England the region with the most precipitation,” the forecast center said.

-A d-

“Heavy rains in relatively slow-moving thunderstorms can lead to scattered instances of flash flooding from southern New England to the Delmarva Peninsula, including major cities on I-95 from Boston to Philadelphia,” added officials. responsible. .

The region is already recording between 2.5 and 7.6 centimeters of rain. With an additional 1 to 3 inches of precipitation expected, with higher amounts in some locations, flooding is a concern, the National Weather Service added.

CNN News in Spanish