Thousands of residents across parts of southeast Arizona and southwest New Mexico were urged to remain indoors Monday afternoon as the National Weather Service (NWS) issued Blowing Dust Advisories warning of sharply reduced visibility and dangerous travel conditions along major roadways. Blowing dust can create dangerous conditions both on the road and for public health, officials warn. Sudden drops in visibility can make highways nearly impassable, increasing the risk of crashes, pileups, and