Three days after a catastrophic wall of water, mud and rock tore through Nepal's Himalayan valleys, the scale of the disaster is still coming into focus. At least 579 people are now confirmed dead, nearly 2,000 remain missing, and the danger is not over. Authorities are closely watching lakes formed in the wake of the glacier collapse, amid fears of further flooding. Stephanie Sy reports.

Extreme heat is the deadliest weather-related threat in the U.S. In Phoenix, heat kills more people than homicides each year. So the city is turning to an unlikely lifesaver: bags of ice. And the fire department is creating a new model in the battle against heatstroke. For our series, Tipping Point, Ben Tracy of Climate Central shows how this low-tech approach is saving lives.