Meteorologists have been using a nearly 50-year-old scale to measure the wind speed and storm surge of a hurricane. But it's not a good measure for rain, which can often become the most dangerous aspect of a storm.
North Carolina Gov. Roy Cooper says the state is confronting an epic disaster with the catastrophic flooding caused by Hurricane Florence. The recovery will involve difficult questions about living with the hazards of water.
Flood waters breached a pit of coal ash at a power plant in Wilmington, N.C., spilling heavy metals into a nearby lake. NPR's Ari Shapiro talks with Frank Holleman at the Southern Environmental Law Center about the risks of coal ash water contamination.
Mexico City's thirst is sucking even more water from the ancient lake bed on which the city sits, it to sink. Climate change, political inaction and poor infrastructure is intensifying the problem for a metropolis of 22 million people.