The only thing I worry about during a thunderstorm is whether there could be a tornado with it (if there's hail, there's a greater chance there could be a tornado, but one doesn't always mean the other). by the way, a lady in a town near here was killed by lightning while talking on the phone, although cordless phones shouldn't be a problem:
http://www.snopes.com/horrors/techno/phone.asp
I really wish we would get a storm here, I love to watch them, too.