I'm hijacking here, but it's an important topic.

I agree that there is no shame in bailing on a ride because of electricity! Be warned; if you ride with groups of men (here I go being sexist yet again...) they will often try to ride through or "away from" a t-storm. I always take responsibility for myself and will find shelter, even if this means being left behind. Usually I can convince one or two of the sane ones to stick with me; I think they are secretly glad that it's the girl who's the scaredy-cat

Good safety info can be found here