There are inherent dangers during heavy rain events on any scale. In fact, drowning is the number-one cause of flood deaths. Use a pole or stick to ensure that the ground is still there before you go through an area where the water is not flowing. Do not drive through a flooded area.
More people drown in their cars than anywhere else.
A car can float in as little as two feet of water. Stay away from power lines and electrical wires. The number two flood killer after drowning is electrocution. Electrical currents can travel through water. Report downed power lines to Com Ed.