Leaves and debris can cause localized flooding if they cover storm drains in the street. Blowing or sweeping fallen leaves into the street makes them a safety and stormwater hazard to your property and your neighborhood. The storm drains in your street catch, move, and release rainwater into the nearest stream to keep excess water away from your property.
What you can do
Check to make sure storm drains in your neighborhood are clear of debris before major storm events
Rake fallen leaves into your yard waste bin
Use leaves as mulch on garden beds and landscaped areas