A killer heat wave baking southern China since early July has claimed at least 444 lives, damaged millions of acres of crops, dried up rivers and melted roads, official press reports said Wednesday. The scorching weather, with temperatures hovering between 95 and 105 degrees for several weeks, has left 71 people dead in the densely populated port city of Shanghai, the official China News Service said. Crematorium officials in the city said most of the dead were elderly people.