Nathan Rott

The remote region of Ridgecrest, Calif., was hit by back-to-back earthquakes, the state's biggest in 20 years. The many powerful aftershocks have residents worried about what comes next.

California is recovering from a pair of the strongest earthquakes in two decades. Seismologists say the region can expect to continue to be hit by strong aftershocks for some time to come.

When does it make sense to give up adapting to climate change and simply retreat? A first-of-its-kind conference this past week explored the difficult and contentious issues around that concept.

Cities, states, businesses and electric utilities are setting ambitious goals to cut greenhouse gas emissions. But it's not clear exactly how they'll do that or whether it will actually work.

Research shows more people are linking climate change to extreme weather events, like the ongoing flooding in America's heartland. Experts are hoping it also inspires action.

An increasing body of research finds people's beliefs about climate change can be changed by big disasters, like the current flooding across America's heartland.

Weeks of rain across the Midwest and the Great Plains have kept many farmers from planting crops. On top of that, they are dealing with President Trump's ongoing trade dispute with China.

The Arkansas River is rising well above its previous record, and it's forecast to stay that way for days. That's putting pressure on old levees and making it hard for some residents to evacuate.

A surge of floodwater is moving from Oklahoma and into Arkansas. The rain has been relentless the past month and swollen rivers and tributaries are overwhelming some cities.

The Environmental Protection Agency's internal watchdog has found $124,000 in improper travel expenses by former administrator Scott Pruitt. It suggests the agency find a way to recover those costs.

"Protecting biodiversity amounts to protecting humanity," says UNESCO Director-General Audrey Azoulay, who warns that species are being lost at an alarming rate.

Private companies are proposing solutions to store the nation's nuclear waste. The U.S. Nuclear Regulatory Commission is considering one storage site in New Mexico's desert.

Authorities are questioning a 19-year-old Southern California resident who allegedly opened fire in a synagogue Saturday, killing one person and injuring three others.

Two universities in Los Angeles have placed some students and staff under quarantine or self-isolation after they were believed to have been exposed to someone on campus with measles.

The Trump administration is delaying efforts to boost offshore oil and gas drilling in the wake of a recent court setback. The plans have been controversial, even in Republican-held states.

The Trump administration's revisions to the Waters of the U.S. rule will strip federal water protections from millions of miles of rivers. The impact will be even more pronounced in the arid Southwest.

A private company wants to store high-level nuclear waste in a rural corner of New Mexico. The Nuclear Regulatory Commission is considering the proposal, but local support may be a challenge.

David Bernhardt, President Trump's pick to lead the Department of Interior, made his case before a key Senate panel on Thursday. He faced hard questions about his background as an energy lobbyist.

New Mexico lawmakers passed a bill this week mandating state utilities use 100 percent renewable energy by 2045. Meanwhile, oil production in the southeast corner of the state is breaking records.

New Mexico lawmakers are set to pass what could be the country's most aggressive push for 100 percent clean energy. It's happening even as the state is in the middle of a record-setting oil boom.