Lauren Sommer

The world's largest trees are adapted to wildfires. But with fires getting more extreme, scientists warn that giant sequoias are running out of time.

Burning fossil fuels must decline almost immediately, a new study finds, for the planet to avoid more extreme floods, droughts and heat waves.

With the global pandemic still in the spotlight, more than 200 leading health journals say climate change is an even more urgent threat.

Another destructive fire season has Western states searching for ways to prevent it. The Southeast just might have the answers: setting controlled fires before the wildfires come.

Coastal cities need billions of dollars to build defenses against sea level rise. Tensions are rising over where that funding will come from: taxpayers or private companies with waterfront property?

Severe drought is spreading after a record dry year in the Western United States. Climate change is only making water shortages worse.

Hotter oceans are putting coral reefs in peril worldwide. Scientists are warning that to save them, heat-trapping emissions must fall, and reefs will need more protection and restoration.

Kelp forests along Northern California have almost vanished. Divers and scientists are racing to stop purple sea urchins from taking over critical habitat.

Climate change is hitting the oceans hard, both warming and acidifying the water. Ocean scientists are hoping the Biden Administration dives in quickly to address it.

Power outages are increasingly common, putting everything from clean drinking water to medical equipment at risk. Some communities are installing solar power and large batteries to protect themselves.