Climate

Humanity is ignoring major planetary vital signs as atmospheric carbon dioxide levels soar to all-time highs and Earth records its 12th consecutive month of record-breaking heat, international climate officials warned …

It appeared that the fate of towering ficus trees rooted along a three-block stretch of Whittier’s commercial center was sealed. City Council members in December voted to approve a redesign …

As federal and state health officials expand their avian flu surveillance, the San Francisco Department of Public Health has reported that the virus has been detected in wastewater samples collected …

Months after discovering that radioactive waste and toxic pesticides may be buried under two popular Bay Area parks, state regulators have rejected Berkeley’s plan to test for contaminants as insufficient. …

We choose to do these things not because they are easy, but because they are hard. President John F. Kennedy was talking about going to the Moon during the 1960s. …

Climate change is transforming the character of the West’s hottest periods — making them more frequent, more persistent and more lethal. For almost all of human history, heat waves have …

A wildfire that broke out over the weekend near an explosives and material testing site in San Joaquin County, forcing residents to evacuate, injured two firefighters and destroyed one home, …

A significant, early-season heat wave is expected to broil much of inland California this week, with highs set to top 100 from the Sacramento Valley to the Antelope Valley — …

Known for its glowing swaths of yellow, orange and red, the U.S. Drought Monitor has warned farmers, residents and officials throughout the nation of impending water scarcity every week since …

A significant early-season heat wave headed for western North America is threatening to deliver stifling temperatures that could break records. Here, a jet soars above Phoenix during a period of …