Something's live when it shouldn't be... if you don't know your electrics,( & I don't really) I'd disconnect the batt ( NEG lead first!) & get it towed.
If you DO like to play, the first thing I'd check is the ignition leads into the barrel. It's a pita to get out( the barrel) with 2 anti theft screws that need drilling out, but a lot of guys have had solder joints melt here, as the headlight current is passed thru the ignition wires. The headlight relay mod bypasses this problem, & is easy to do.
I'm guessing somethings melted & shorting.