Divide this number by 5. The number you get is your approximate distance from the lightning. For example, if you count nine seconds between the flash and the thunder, the lightning struck just under two miles away. There are no official lightning watches or warnings. In lieu of official lightning watches and warnings, you can keep your own vigilant watch on the sky.
Lightning can cause power surges.
Unplug all appliances, including air conditioner, before the storm hits. Listen for storm updates on a battery-powered radio. Avoid using the phone. Telephone lines can conduct electricity. Metal pipes also conduct electricity.