A lightening strike could send a power surge into the homes electrical system and can travel through water to an open outlet.
During an electrical storm adhere to the following precautions:
Do not shower or hand wash dishes.
Stay off the telephones during an electrical storm.
Shut down computers.
Even if you have a surge protector, it is best to power down until the storm passes. Turn off all electronics that are not necessary to keep running.
If you follow these steps, the potential for fire or an electrical shock will be greatly reduced.
If you have any concerns about your electrical system, call a qualified electrician or electrical contractor and have them do a home inspection to ease your mind about your safety during an electrical storm.