In most cases, there should be a cutoff valve on the cold water line going into heater.  Shut this off and this will stop water from going into leaking heater. 

 Clean your showerhead and remove all dirt. If there is no dirt, or you find sediment in your showerhead, call Wehby Plumbing.

 If there is no obvious source of the water from above, some investigating will need to be done to determine if it is plumbing leak or some other type of leak like from an air conditioning unit or a roof leak.

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