JOPLIN, Missouri: A massive tornado that tore through the southwest Missouri city of Joplin killed at least 89 people, but authorities warned that the death toll could climb Monday as search and rescuers continued their work at sunrise. City manager Mark Rohr announced the number of known dead at a pre-dawn news conference outside the wreckage of a hospital that took a direct hit from Sunday's storm. Rohr said the twister cut a path nearly six miles long and more than a half-mile wide through the center of town. Much of the city's south side was leveled, with churches, schools, businesses and homes reduced to ruins. An unknown number of people were injured in the storm, and officials said patients were scattered to any nearby hospitals that could take them. Authorities planned to conduct a door-to-door search of the damaged area Monday morning, but were expected to move gingerly around downed power lines, jagged debris and a series of gas leaks that caused fires around the city overnight. “We will recover and come back stronger than we are today,” Rohr said defiantly of his city's future.