The slow-moving cloud — known as a haboob — hit parts of Phoenix and Arizona City, 60 miles to the southeast, late Monday afternoon, at one point leaving 15,000 energy customers in the dark. The number still without power Tuesday morning was more than 5,000 according to Poweroutage.us, mostly in Maricopa County.

Much of Arizona saw a monsoon storm roll in, and in the Valley, we saw a massive dust storm cover roads as rush-hour traffic weaved through the city.