Can wet electrical wiring cause a fire?

Answer 1

Wetness, in itself, does not cause fire in contact with wiring. What can cause a fire is when water comes into contact with bare live conductors and there is enough water to provide an unbroken path to another conductor or conductive surface (usually anything metal). But even in this case if the wiring is done properly and otherwise undisturbed, breakers or fuses should provide adequate protection against fire.