New research raises questions about the familiar map's ability to address long-term drying trends, including persistent dry spells across the American West.
A powerful high-pressure ridge will bring unusually hot temperatures to the Golden State by the middle of this week, before spreading into the Pacific Northwest.
Researchers found evidence of two epic Southern California floods that occurred in the last 600 years and were much larger than the Great Flood of 1862.
A third U.S. dairy worker has been infected by avian flu, the second case in Michigan. Federal agriculture officials are encouraging dairy farms to test herds.
As researchers scramble to understand the extent of H5N1 bird flu spread, there's one group of animals they say we should pay special attention to: Our pets.
The Catalina Island Conservancy, which controls 88% of the island, announced Wednesday it was scrapping plans to eradicate the non-native mule deer population by shooting them from helicopters with high-powered rifles.
The governor's budget proposal would slash the program that encourages biking and walking but would sink billions into widening roads, which aggravates traffic and pollution.
Otter 841, California's most ornery sea mammal, has returned to waters off Santa Cruz. Authorities warn surfers and swimmers to steer clear of the creature.
The Biden administration announced $179 million for wastewater recycling projects, boosting plans to build the nation's largest plant in Southern California.
Dennis Falaschi's plea agreement marks a twist in a criminal case that has captivated farmers in the San Joaquin Valley — and raises a host of new questions about who, exactly, engineered the long-running federal water theft and who…
The goldspotted oak borer is just 14 miles from the Santa Monica Mountains' 600,000 oak trees and threatens to devastate forests throughout California, harming wildlife and increasing fire risks.
Activists urge California wildlife officials to crack down on Arrowhead bottled water operations in the San Bernardino Mountains, citing harm to wildlife.
Hydrologist Melissa Rohde studies California ecosystems that depend on groundwater. In many areas, declining water levels put habitats at risk of drying up.
General Sherman appears to be holding up well (not bad for a 2,200-year-old), but because of pests and climate change, the largest tree in the world needs a checkup
Conditions on the West Coast may be calmer than last year, when a rare storm swirled off the coast of Baja California before making landfall in early August.
Lake Shasta, California's largest reservoir, reached full capacity for the second consecutive year. Over the winter, officials even released excess water.
A 3.5-million-acre swath of Mojave Desert, between Ridgecrest and the Morongo Basin, has been named a sentinel landscape, a federally led effort to promote sustainable land-use near military installations.
A second human case of bird flu has been detected in a Michigan dairy worker as federal health officials ramp up the supply of anti-virals and vaccines.