Hundreds of thousands remained without power in the region, prompting many schools to cancel classes on Monday. : Winter Storm Diego walloped parts of the South this weekend, leaving hundreds of thousands without power in North and South Carolina, Tennessee and Virginia. Many schools in the region were expected to cancel classes on Monday due to the severe weather. North Carolina declared a state of emergency over the weekend in preparation for the storm. In at least one part of the state, Diego dumped 18.5 inches of snow, according to The Weather Channel.