The 2026 Pacific hurricane season is just around the corner — and the latest numbers suggest a volatile year ahead.
In the latest outlook from AccuWeather, forecasters are warning of an active season that could increase flood risks for parts of the Southwest U.S., including Southern California, even without direct landfalls.
For the first time, golden mussels, an invasive species of tiny mollusks that can rapidly reproduce and cause millions of dollars in damage to pipes, drinking water plants, irrigation systems and dams — sparking growing concerns across California — have been found in Santa Clara County.
Last month, a juvenile golden mussel was discovered in the raw water intake area at the Penitencia Water Treatment plant near Alum Rock Park in San Jose. A few weeks later, in late April, an adult was found in a raw water strainer at the Santa Teresa Water Treatment Plant in San Jose’s Almaden area.
Lake Shasta, the largest reservoir in California, has continued to make headlines. The lake’s water levels are nearing capacity again, thanks to additional storms since January 2026 saturation, which created a steady level increase not seen since 2011. Right now, the reservoir is at a mere 14 feet from full.
While the arid summer months ahead are expected to drop the current level, the overall streak has been quite an impressive and dramatic change. Especially when looking at the timeline of the drought-riddled lake beginning in 2021, a timeframe that included measurements of 38% capacity.
It has been widely reported that March was a disaster for California’s snowpack. Summer seemed to arrive three months early, with record-shattering heat and dryness and a mere pittance of precipitation. Did a relatively cool, rainy, and even snowy April make up for it? The short answer is no—but it helped.
It’s important to remember that snowpack is California’s third-largest source of water storage, behind surface reservoirs and groundwater. Our statewide water supply grid is built around storing roughly 30% of statewide water supply in snowpack, a relatively reliable source of water through the 20th century.
The Colorado River provides water to some 40 million people across seven U.S. states and Mexico. And, after a historically hot and dry winter, those western states are scrambling to shore up supplies.
One solution comes from California, Arizona, and Nevada. The three Lower Basin states recently announced a water-saving plan that aims to “stabilize the Colorado River through 2028.” The proposal suggests a 13% reduction in California’s use of the river water; Arizona and Nevada will also cut back.
The states of California, Arizona and Nevada have proposed voluntary water-saving measures for the next three years aimed at buying time while negotiations remain deadlocked over the future of shrinking reservoirs filled by the Colorado River.
The Colorado River provides water to some 40 million people in the American west. But the two massive reservoirs filled by the river, Lake Mead and Lake Powell, both stand at historically low levels, after consistent overdrawing coupled with reduced snowpack and warming from climate change.
Proponents of a huge water project are claiming victory after the $20 billion tunnel largely cleared a key hurdle last week. But the massive construction — known as the Delta tunnel — is still mired in controversy, and many roadblocks lay ahead, writes CalMatters’ Rachel Becker.
To shore up state water supplies, the Delta tunnel aims to divert more water from Northern California — while bypassing the Sacramento-San Joaquin Delta — and deliver water to roughly 30 million people living mostly in Southern California, as well as farmland.
For the first time, growers in one of California’s most acutely water-stressed areas have to reveal how much groundwater they are pumping. For generations, they’ve been free to take water from wells on their own land without reporting to it the state.
The State Water Resources Control Board ordered landowners in parts of the San Joaquin Valley around Corcoran and Pixley to submit detailed reports by Friday.
Two high-profile water crises, juiced up by climate change and industrial overuse, are building in the US. From a city in Texas staring down a drought emergency to a decades-long political crisis coming to a head for the states that rely on the Colorado River, water issues in the West will take center stage this summer—and experts tell WIRED that other places should take notes and start planning ahead for their own future.
In February, following a winter of record-breaking heat, snowpack in various mountain ranges across the American West reached record lows. March came in even hotter, smashing records in states across the region.
