Dust storms have battered southwestern U.S. states, grounding flights and leaving people without power. A dust cloud—known as a haboob—smashed through Phoenix and Arizona City, both in Arizona, on Monday. A similar event made the Burning Man Festival, Nevada, look like a Mad Max sequel. Dramatic footage has circulated online, with pictures showing walls of dust towering over cities as they are plunged into darkness. About 15,000 people lost power across Arizona, as reported by NBC News and tracked by poweroutage.us. Delays were reported at Phoenix Sky Harbor International Airport, while locals endured challenging driving conditions. Many of the power outages occurred in Maricopa…..