At around 7:40 p.m. Eastern on Wednesday, a tornado swept through Gaithersburg in Montgomery County, Maryland, around 22 miles northwest of Washington, D.C., seriously injuring at least one person.

“Spotter confirmed tornado in Poolesville, Montgomery County, MD!!” the National Weather Service’s Baltimore-Washington Office wrote on X. “People in and around Gaithersburg, Olney, and Brookeville should take cover immediately!!!”