Flagstaff AZ – Yavapai County Sheriff's Office spokesman Dwight D'Evelyn says the boy's parents tried to bring the sick child to a hospital during a powerful storm on Thursday night.
The parents loaded the boy and his 8-year-old sister into a pickup truck at their home about 70 miles north of Phoenix. Floodwaters disabled the truck and pushed it off the road.
The mother somehow made it to higher ground, while the father and two children got into the truck's bed.
The three were swept from the truck bed. The father managed to get to safety with his daughter, but the boy remains missing.