Answer: The worms are traveling on a film of moisture that has rapidly dried up and stranded them on your sidewalk. You can hose them back into the flower beds or lawn right after a rain and they'll bury themselves back in the soil. Worms are beneficial, andindicate your soil is alive and healthy. This is usually only a problem when the weather is cool in the winter and spring. By summer they'll retreat deeper into the soil and not be such problems for you.
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