LES CAYES, Haiti—A hospital in southwestern Haiti, where a powerful earthquake flattened homes, shops and other buildings over the weekend, was so overwhelmed with patients that many had to lie in patios, corridors, verandas, and hallways. Then a looming storm that could bring heavy rains Monday night forced officials to relocate them as best they could given the hospital’s poor conditions. Even those patients were somewhat fortunate. Haiti’s Civil Protection Agency on Monday raised the death toll from Saturday’s earthquake to 1,419 and the number of injured to 6,000, many of whom have had to wait under the burning heat, even on an airport tarmac, for help. “We had planned to put up tents (in hospital patios), but we were told that could not be safe,” said Gede Peterson, director of Les Cayes General Hospital. It is not the first time that staff has been forced to improvise. The refrigeration …