A 12-year-old boy who was swept away by rushing water is believed to have been found dead after flash flooding impacted the Mid-Atlantic, authorities said Wednesday.

Over 200 students and staff were evacuated from Westernport Elementary School in Maryland after heavy rain caused a flash flood.

Soon after a judge let stand approvals related to flood protection construction at Annapolis City Dock, the anonymous plaintiff filed an appeal, according to court documents.

Heavy rain over hilly and mountainous terrain quickly triggered serious flash flooding in parts of Maryland, Pennsylvania and West Virginia.

The devastating flooding, which impacted parts of Maryland and Virginia, also trapped more than 200 students and teachers.

Parts of the Southeast and Mid-Atlantic were slammed with multiple inches rain, triggering flooding across multiple states.

The body of a 12-year-old boy has been found after he was swept away by rushing water on a Virginia roadway, while a dozen students stayed overnight at a Maryland high school as heavy rains led to flooding in several states, officials said.

A flash flooding emergency was declared by the National Weather Service for parts of western Maryland Tuesday and footage from a fire station in that area showed exactly what was in store.