It's not the first time I've ended up with a pair of soggy shoes (usually it happens when I'm actually riding, not driving). The important thing in this situation is to dry them out as soon as possible. For two reasons- 1) You may want to use them again soon. 2) They longer they take to dry out, the more of a 'funk' they'll develop (trust me- it's gross).
All you need to speed up the drying process is some newspaper.
Open up the shoes as much as possible- loosen the laces, undo the velcro. Crumple up a couple pages into balls and stuff them into the shoe. Give it a little time to soak up water. I waited about 30 min. Pull out the soggy paper, replace it more dry paper, and repeat the process until the paper you pull out is dry. It took three rounds of paper to dry these babies out.
This works great with all kinds of shoes. No joke.