MARC train riders endured a slow commute Thursday morning, as flooding problems along all three lines led to delays and other challenges.

MARC said late Wednesday night that it expected to install speed restrictions on the Camden and Brunswick lines, and that Penn Line trains would be delayed leaving Baltimore due to flooding in the tunnel between West Baltimore and Penn Stations.

Riders experienced delays of as much as 20 minutes during rush hour Thursday.

“Mid to late morning Penn Line trains (419, 421, 423 and 523) are likely to experience additional delays since these trains make earlier runs south to Washington, back to Baltimore, then south on a second trip to Washington,” MARC said in a note to riders. “Delays on the first trip ‘domino effect’ to the subsequent trip.”

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