Streets lined with gold? Not exactly, but a new report from the U.S.

Firefighters are tackling larger and more aggressive wildfires as drought conditions continue for a fifth year in California, drying out swaths of forest land.

As debate continues in San Diego County and around the state over how aggressively to conserve water amid a historic drought, a new study finds that reductions in urban water use have saved signifi

California decided Wednesday to allow hundreds of local water districts to set their own conservation goals after a wet winter eased the five-year drought in some parts of the state.

The solar-powered aeroplane Solar Impulse has landed in Silicon Valley, California, after a three-day flight over the Pacific Ocean from Hawaii.

Decreases in ambient air pollution levels over the past 20 years in Southern California were associated with significant reductions in bronchitic symptoms in children with and without asthma, accor

California is in a unique predicament, and it’s one of the reasons the state continues to suffer from long-term exceptional drought.

Residents and businesses in drought-stricken California cut back water use by nearly 25 percent from June 2015 through the end of February 2016 - enough to supply nearly 6 million people for a year

A new U.S.

We develop a statistical model using extreme value theory to estimate the 2000-2050 changes in ozone episodes across the United States. We model the relationships between daily maximum temperature (Tmax) and maximum daily 8-hour average (MDA8) ozone in May-September over 2003-2012 using a Point Process (PP) model. At ~20% of the sites, a marked decrease in the ozone-temperature slope occurs at high temperatures, defined as ozone suppression.

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