Phoenix weathered a massive dust storm last night prompted by a string of thunderstorms. Thick trees were blown down as winds hit 60mph in some areas, the Arizona Republic reports. With power lines down, thousands lost electricity. Car windows were shattered and plane takeoffs and landings were halted for about 40 minutes. Minor injuries were reported in the third huge dust storm to hit the area since July. The giant wall of dust slashed visibility to less than a quarter-mile. (More rainstorms stories.)