California

"Flood watch notices were posted across northern and central California for Thursday ahead of an atmospheric river storm expected to douse much of the state with heavy rain, including mountain areas still buried from a near-record snowfall."

"It’s an arcane system of water law that dates back to the birth of California — an era when 49ers used sluice boxes and water cannons to scour gold from Sierra Nevada foothills and when the state government promoted the extermination of Native people to make way for white settlers."

"A warming climate has left a fifth of the conifer forests that blanket California's Sierra Nevada stranded in habitats that no longer suit them, according to a study published last week by researchers at Stanford University."

"Record rain and snowfall in recent weeks has eased half of California out of a persistent drought and bolstered the store of mountain snow that the state relies on to provide water during the warm, dry spring and summer."

"Chronic coastal contamination from the Tijuana River can end up in the atmosphere as “sea spray aerosol” — spreading far beyond the San Diego County beaches where it has long polluted the water, a new study has found."

"Government regulators Thursday granted California’s largest utility an unusual exemption that could allow the state’s last nuclear power plant to continue running after the expiration of its federal operating licenses, a key piece of a contentious proposal to keep the reactors producing electricity for years to come."

"Federal wildlife officials on Wednesday announced a proposal to classify one of two dwindling California spotted owl populations as endangered after a lawsuit by conservation groups required the government to reassess a Trump administration decision not to protect the brown and white birds."

"California's largest and most expensive environmental cleanup has failed to properly remove lead pollution from some homes and neighborhoods near a notorious battery recycler in southeast Los Angeles County, leaving residents at continued risk, a Los Angeles Times investigation shows."