This rain may be the ticket to picking up some nightcrawlers, although there might not have been enough...
Growing up in Ontario, I would get my fishing worms at night, at the local golf course, after a summer's rain (little bit of trivia, that course was Mike Weir's home course). The nightcrawlers would be thick on top of the short grass and it was easy pickin's. There never seemed to be many on my lawn at home, but the golf course was the bomb. I even got so serious about it that I would strap 2 coffee tins to my legs and wear a head lamp so my hands were free and I could just walk and pick. The trifecta was to get a mating pair of worms in each hand at the same time and land all 4 of them.
So, it may be worth it to head out late tonight, well after dark, to some grassy areas with a flashlight and see what has popped up.