The latest floods exposed the deep vulnerability of many mountain communities in eastern Kentucky, where land ownership patterns and other barriers to recovery can leave residents with few options.

Immigration isn’t the only hot-button issue along the US-Mexico border. There’s also a growing water shortage that’s affecting farmers, businesses and cities on both sides.

The state is seeing a sharp water divide this year, with lots of rain in the north while the south has stayed dry. A hydrologist explains what’s happening.

Scientists have assessed more than 23,000 species.

If federal streamgages were bolstered by networks of cheaper monitors run by communities, the results could save lives.

A powerful storm hitting the West Coast combines these phenomena for a wet week of erratic weather, as a meteorologist explains.

A powerful storm hitting the West Coast combines these weather phenomena for a wet week in many areas. But forecasting exactly which areas will get hit hardest is tough, as a meteorologist explains.

Trees act like sponges because their roots help soil to absorb water, plus trunks are a natural barrier to floodwaters.

These powerful ‘rivers in the sky’ provide a huge share of annual precipitation in many regions, including California. They can also melt sea ice, with global climate implications.

The hydropower dam is part of a huge effort to boost India’s homegrown energy. But it will radically disrupt the lives and livelihoods of indigenous communities in the flood plains downstream.