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Hi, I'm Mike G and I'll be assisting you. Yes you selected a dollar amount to work the question. As far as you problem with the lights, no doubt the rain caused a fault to ground probably at the plugs on the strings. The outlet it's plugged into should have a in-use cover preventing rain from getting to the connection. If the strings are connected one to the other, I suggest a plastic bag with tape on each with the point elevated to prevent the connection from getting wet. There isn't much to do until it drys out.
If you still need a phone service let me know. I've given all info that you need already.
Phone session complete. Customer advised to remove string one at a time while resetting the GFCI to isolate where the fault is.