The Illinois Department of Public Health is warning trick-or-treaters to be alert to dangers as they go from house to house Tuesday night.
Public health director Doctor Eric Whitaker says parents should be with children under 12 and remind them to look both ways before crossing the street.
Whitaker also suggests parents inspect all treats and throw away any unwrapped or loosely wrapped items. He also says home-made or baked goods should be discarded unless the giver is known.
Costumes should be bright, reflective and flame retardant, and they should be short.
Whitaker says motorists should drive slowly in residential areas, and watch for children darting out from between parked cars.
And homeowners should turn on outside lights if welcoming trick-or-treaters.