[This post has been updated; 1:10 p.m.]

Penn Line service between Washington and Baltimore was temporarily suspended Monday afternoon due to high water on the tracks, according to the Maryland Transit Administration.

Officials expected to resume service about 12:50 p.m. but warned that there would be “significant delays to all trains” through the Baltimore area of 15 to 30 minutes.

MTA spokesman Terry Owens said the flooding occurred inside the Baltimore and Potomac Tunnel, where there was 18 inches of water over the rails. Owens said the MTA established a bus bridge between West Baltimore and Baltimore Penn Station, but the impact to passengers was minimized due to light travel during the early afternoon hours.

Amtrak operates MARC's Penn Line, which connects Washington and northeastern Maryland through Baltimore.

Amtrak also said that its passenger rail service was temporarily affected by the flooding and warned of residual delays.

High water and other hazards have posed continuing problems for the region’s commuters today, with standing pools on roadways, a sinkhole developing in Upper Marlboro and traffic signals darkened by power outages.

Monday morning Metro commuters may have had the worst of it, though, after standing water in a tunnel between Braddock Road and National Airport stations forced the transit authority to suspend rail service and bridge the gap with buses.

Check back for more details.