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Stranded passengers are rescued from a flooded GO Train in Toronto on Monday. (Frank Gunn/Canadian Press)

GO Transit is going to try to make it up to the 1,400 customers who were trapped on one of its trains for hours on Monday night.

The passengers were marooned for hours — eventually rescued by firefighters and members of the police marine unit — after the train was suddenly caught in a flash flood in the Don Valley.

Water rushed into the train cars, soaking passengers and keeping them inside the train.

In an email to CBC News, GO said it is planning on giving customers a $100 credit.   "We understand how difficult and uncomfortable the experience was for riders on our 5:30 p.m. Richmond Hill train on Monday night," said GO spokesperson Vanessa Thomas.

"As a result, riders on the train who used a PRESTO card will be credited $100 on their card to cover any dry cleaning or other out of pocket expenses they may have encountered as a result of this event."

"The credit," Thomas wrote, "will be uploaded to customer PRESTO cards by Friday."

Passengers who used paper tickets and who show proof of purchase, will be given a PRESTO card loaded with $100.

Passengers are also encouraged to contact GO's customer relations department if they have questions.