Spain mourned at least 158 deaths on Thursday and authorities told people in flood-stricken regions to stay at home as rescuers raced to find survivors in the rare disaster. An exceptionally powerful Mediterranean storm from Tuesday unleashed heavy rains and torrents of mud-filled water that swept away people and wrecked homes, with the eastern Valencia region hit hardest. The body coordinating rescue work in the Valencia region announced that 155 bodies had been recovered there by Thursday afternoon. Officials in Castilla-La Mancha and Andalusia had announced a combined three deaths in their regions on Wednesday. With many people still missing and some areas remaining inaccessible to rescuers, government ministers had warned Wednesday’s provisional toll of 95 was likely to rise.