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The storm brought snow levels to several Northeast cities not seen in years. Another major storm arriving early this week threatens to bring even more hazardous conditions to the region.

California officials are considering whether to take over monitoring groundwater use in part of the fertile San Joaquin Valley.

Extreme wildfires have destroyed about one-fifth of all giant sequoia trees. To safeguard their future, the National Park Service is planting seedlings that could better survive a hotter climate.

In a parking lot and on San Francisco Bay, NPR witnesses two different tests for solar geoengineering to tackle climate change. With much science unsettled, experts say regulations aren't keeping up.

Recent storms have put a dent in California drought conditions. But the long-term issue of depleted groundwater remains.

As rain and snowfall accumulate in San Diego, California is on pace to bring water supply back to normal. But, the long dry period in the Colorado River basin is a bigger problem to solve.

From lack of snow to wildfires, a record-warm winter had impacts across the country. Scientists say winters are warming faster than any other season in the U.S.

The U.S. Drought Monitor’s weekly update Thursday shows that "extreme” drought has been virtually eliminated.

Experts say the precipitation will help relieve the drought somewhat. Exactly how much isn’t clear yet and some areas of the state will benefit more than others.

Another wet winter is breathing new life into wildflowers planted years ago under a federal mandate.