A flood at the Danbury Railway Museum has forced its closure for most of the rest of the week,  The basement was flooded with 7 feet of water Monday, damaging mechanical and electrical systems.  As officials assess the damage, power has been shut off to the Uncle Sam statue in the museum's parking lot.  The heating system at the Railway Museum is being drained so repairs can be made.  The cause was a broken water line, but it’s unclear whether there was a faulty valve or crack in the main.  The museum was closed Monday, and is normally closed Tuesdays.  They will be closed today and tomorrow too.  The museum rents the building from the city of Danbury and the city has insurance, but it the cost of repairs was not immediately known.