Officials say thousands have died in the deluge.
Louis Kirsten, a spokesman for the South African military, said helicopters rescued more than 3,000 people Monday, including everyone in immediate danger along a particularly hard-hit area of the Limpopo River. But Michele Quintaglie, a spokeswoman for the U.N. World Food Program, said thousands more were still at risk. There will be thousands of people left behind tonight. These people will be on their own to get through the night. While there was no precise death toll, Quintaglie said it was certain that the number of dead was in the thousands.