This is a test of commonsense. Complete the next sentence:

How to find worms
Wait for a rainy fall day.
You can find worms at any time, but it will be easiest when it's just rained. The water drives the worms out of the ground into the open air.
They'll head for dry land: sidewalks, roads, driveways, and patios. Look for worms on a humid day before it rains, or during a rain-shower.