Climate Change

States that use Colorado River water need to agree on new rules for sharing it by 2026. If they don't, they will likely end up in messy court battles.

A new analysis shows that climate change is causing the number of extremely hot summer days to rise in most major U.S. cities. Some of the biggest increases are in the Mountain West.

Nationwide, thousands of Indigenous households rely on firewood to heat their homes. That's why the Washoe Tribe of Nevada and California is making sure their elders have the chopped wood they need.

Excessive exposure to heat can have negative affects on pregnancy; Climate Central shows that Mountain West states are leading the way in these complications.

Drought conditions in the Rocky Mountains could further lower water levels at Lake Powell.

The advocacy groups Public Citizen and The Revolving Door Project brought insurance premiums and non-renewal data to life with interactive maps.

Top water negotiators declined to speak at an upcoming conference amid closed-door meetings about the future of the water supply for 40 million people.

Climate Central analyzed data from the National Park Service and found that by 2050, the 25 most visited parks are likely to have five times as many extremely hot days.

Triton was the first submersible to reach the deepest points of all five oceans. Journalist Susan Casey shares her experience diving in Triton to the ocean depths.

A key part of combating climate change is reducing harmful emissions from meat production on so-called factory farms. One group is calling for tougher regulations to cut the amount of emissions.