If you have one and haven't already, a leaf blower is good to blow water out of the nooks and crannies that could be sitting in there that you can't see. As you have probably read, when we wash our bikes (under known circumstances

) we will take the leaf blower to it immediately after and then run it for about 10 minutes to dry up any remaining water we can't see. Unfortunately in your case you can't get it running to do part2, but you definitely want to blow out any water that may be hanging around. But, if it's as hot there as it is in central Alabama, any water on the bike anywhere would be scorched out by the heat of the sun in 5 minutes.
On a side note, I hope you weren't too hard on the nephew. Good to see the kid taking some initiative versus the world full of lazy entitlement idiots we have raising more entitlement idiots.