The National Weather Service in Tucson has issued a dust storm warning for Pinal County, including Maricopa, until 4 p.m. The storm comes with less than a quarter-mile of visibility and wind gusts over 45 mph. Dust storms lead to dangerous driving conditions with visibility reduced to near zero. If driving, avoid dust storms if possible. If caught in one, pull off the road, turn off your lights and keep your foot off the brake.