Trapped sediment in dams 'endangers' water supplies: UN

Thousands of the world's large dams are so clogged with sediment that they risk losing more than a quarter of their storage capacity by 2050, UN researchers said Wednesday, warning of the threat to water security.

California reels from 'endless' storm onslaught, 14 dead

Relentless storms were ravaging California again Tuesday, the latest bout of extreme weather that has left 14 people dead and prompted evacuation of a star-studded town home to Britain's Prince Harry and wife Meghan Markle.

How do tidal marshes store carbon?

Tidal marshes are wetlands that are covered with incoming tidal water twice a day. These marshes may be as small as narrow fringe along a tidal creek or miles across in estuaries with adjacent flat landscapes. There are nearly ...

Using satellites for faster flood information

Researchers at The University of Queensland have used satellites with radar imaging sensors to see through clouds and map flooding and say the technique could provide faster, more detailed information to keep communities ...

Flash floods sweep away houses, cars in Australian town

Entire buildings have been ripped from their foundations after flash floods swamped a small Australian town, with disaster management officials on Wednesday describing the deluge as a destructive "wall of water".

What is a flash drought? An Earth scientist explains

Many people are familiar with flash floods—torrents that develop quickly after heavy rainfall. But there's also such a thing as a flash drought, and these sudden, extreme dry spells are becoming a big concern for farmers ...

Hurricane Lisa menaces Central America

The northern part of Central America was on high alert Wednesday for the passage of Hurricane Lisa, with warnings of devastating winds, downpours and flash floods also affecting Mexico's Yucatan peninsula.

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