Penn trains stuck in W. Baltimore

The 7:40 deparure from Penn Station is being held until further notice in W. Baltimore because there are catinary(sp?) problems. An engineer walking around the train in a hard hat just explained to me that there's been a failure of the catinary system or the overhead lines that electric trains need to run on and all electric trains have been stopped on the Penn Line. (Diesel trains are not effected.) The engineer explained that the lines are made of copper and when it's really hot or cold they expand and contract and mess up the system (something about a clip coming loose and wires hanging out of place).

"Length of delay at this time is not known," conductor has just informed us.
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