[Sangreaal]

If there is a possibility of electrical shock, go to the breaker box and shut off the power to the basement before entering. When the water thaws it'll no doubt create an overload if the waterline is over any outlets. Of course, this may have already happened when the water entered to begin with, so this all might be a moot point...

...just make sure there's no electricity available to the basement before you start heating to make the water thaw. Once it's thawed, pump it out with a sump pump and place plenty of fans all over the basement to dry the area out quickly so mold is either eliminated or kept to a minimum. Mold is bad. You don't want mold...

Marie