Washington (CNN) -- Rescue crews went door to door early Wednesday morning to check on people injured or trapped after severe storms blew through parts of Baltimore, Maryland, damaging cars, blowing roofs off buildings and plunging about 20,000 customers in darkness.
Several people came to a command post the fire department set up to report injuries, but none were hospitalized, said Kevin Clark, director of communications for the Baltimore Office of Emergency Management.
With the area without electricity, rescue crews were having trouble determine how much damage the storm caused.
Several buildings lost their roof, Clark said. Debris littered the streets and trees lay uprooted, he said.
Residents reported a small tornado but the National Weather Service did not confirm a touchdown, Clark said.