State, federal, and local authorities are talking seriously now about a flood warning system for parts of the Grand Canyon, in the wake of the August 17 flood down Cataract Canyon and through Supai village.
[right, campers wait for helicopter evacuation from Supai village after the flood of August 17. Credit, "I'm Just Sayin" blog]
The Arizona Dept. of Water Resources handles water alerts and is likely to the lead state agency. Officials from the Bureau of Indian Affairs and the Army Corps of Engineers are reportedly in the village now, assessing the situation and talking with Havasupai tribal leaders.