I was Wiccan for the better part of ten years, and during a heat wave, someone called me to see if I wanted to join in a big effort to break the heat wave. Now, far be it from me to think she was, perhaps, overestimating our abilities just a bit...but yeah. Rather than go into that, I just said, "I don't think it's a good idea to mess with the weather. It might screw up weather for someone else." That's as close as I get to diplomacy, really.