The South Pacific island nation of Fiji imposed a nationwide curfew Thursday as Category 5 Cyclone Yasa is expected to hit the two main islands of Viti Levu and Vanua Levu later on the day. Authorities urged people to move to higher ground and warned the cyclone could bring waves as high as 52 feet (16 meters) in some places and wind gusts hitting 217 miles per hour (350kmph).