At lower elevations, the back-to-back-to-back series of storms flooded streets and highways, turning them into rivers.
The president's action authorizes the Federal Emergency Management Agency to identify, mobilize and provide equipment and resources necessary to lessen the storm's impact and the subsequent emergency, the White House said in a release. The declaration of emergency allows federal aid to supplement state and local responses to the storm.
The declaration, issued Sunday, includes Apache, Coconino, and Navajo counties as well as the Hopi Tribe and Navajo Nation, the White House said.
The 54 inches of snow that fell in the Flagstaff, Ariz., area since Jan. 18 is still about 2 1/2 feet short of the "Storm of the Century" in December 1967, the Arizona Daily Sun in Flagstaff reported Monday. During the 1967 storm, near-continuous storms buried Flagstaff under 84.6 inches of snow.