The State Department of Ecology reports that dust storms are possible this weekend in parts of the Columbia Basin. Moderate to strong winds are expected starting Sunday afternoon and running through Monday night. DOE officials say winds stir up dust from dry farming areas, construction sites and dirt and gravel roads. People with respiratory illnesses, the elderly , young children, pregnant women and anyone engaged in strenuous physical activity outdoors are most at risk. Wind-blown dust also causes poor visibility on roads and can lead to dangerous driving conditions.