"When Bill Keener started working at the Marine Mammal Center as a field biologist in the 1970s, there were no whales or dolphins in San Francisco Bay. ... Starting in the late 2000s, things began to change."

"Another county in Southern California has confirmed finding mosquitoes that carry the West Nile virus."

"After thousands of sequoias were destroyed by extreme wildfires, tribes are conducting cultural burns."

"The oil industry withdrew its $40 million campaign to kill a historic law to protect neighborhoods from oil drilling’s toxic effects, but is threatening to challenge the measure in court."

"Almost 400 water systems serving nearly a million Californians don’t meet state requirements for safe and reliable drinking water supplies — and fixing them would cost billions of dollars."

"An L.A. Times/WeedWeek investigation finds alarming levels of pesticides in cannabis products at dispensaries across the state".

"Warmer temperatures may be catalyzing a climb in vaporized chemical contaminants across Los Angeles, a new study has found."

"A number of wildfires in New Mexico and California have spawned evacuations, with intense blazes developing quickly and making damage assessments difficult for local officials."

"Several dozen dams throughout California could store up to 107 billion more gallons of water if they underwent repairs to fix safety problems. But facing a staggering state deficit, Gov. Gavin Newsom has proposed cutting funding for a dam repair grant program in half this year, while state legislators want the $50 million restored."

"Strong winds pushed flames through dry brush in mountains along Interstate 5 north of Los Angeles on Sunday, and officials warned residents in the wildfire’s path to be prepared to leave if it explodes in size again."