Sachi Kitajima Mulkey

A record-mild winter and blistering spring heat will mean higher risks of water shortages and wildfires in the months ahead.

A new satellite could transform how water is studied worldwide. But to help unlock its capabilities, scientists first needed to take critical measurements on a mountaintop.

A record-breaking snow drought has residents worried about much more than slushy slopes.

An unusual outbreak of wildfires in city parks gave scientists a chance to study these rare events. Now they’re coming to different conclusions.

Researchers found that a majority of studies on coastal sea levels underestimated how high water levels are, and hundreds of millions of people are closer to peril than previously thought.

Leticia Carvalho heads a global authority that’s been struggling to set rules for a decade. President Trump’s aggressive push on ocean mining makes her task more urgent.

Elon Musk wants to launch a million satellites, but researchers say global warming is changing the upper atmosphere in ways that makes space junk linger.

It’s the latest twist in the controversial global race to mine the deep sea for rare-earth elements and other valuable resources.

A warmer atmosphere has the potential to hold more moisture, which can contribute to heavier precipitation in any season, scientists say.

Over two decades after negotiations began, the High Seas Treaty is designed to protect biodiversity in international waters by enabling conservation zones.

Last year was Earth’s third hottest globally, but temperature is just one measure of climate change’s influence.