You are now in San Diego County category.

Graphene-oxide membranes have attracted considerable attention as promising candidates for new filtration technologies. Now the much sought-after development of making membranes capable of sieving common salts has been achieved. New research demonstrates the real-world potential of providing clean drinking water for millions of people who struggle to access adequate clean water sources. The new findings from a group of scientists at The University of Manchester were published in the journal Nature Nanotechnology. Previously graphene-oxide membranes have shown exciting potential for gas separation and water filtration.

State legislators aren’t getting answers about the Lake Oroville spillway. Neither is the federal government. Or the county government. Or journalists. Or interested citizens. It’s all coming to a head as two north state legislators whose districts include Lake Oroville are demanding answers. Well it’s about time. It all came to a head last week. On Thursday, Assemblyman James Gallagher, R-Yuba City, admitted at a public appearance in Chico that he had a lot of questions about the broken spillway — more questions than answers.

A strong, wind-packed spring storm has the potential to flood a river in the Sierra Nevada and soak the San Francisco Bay Area, forecasters said. National Weather Service forecaster Idamis Del Valle said the storm will reach the area late Thursday and the heaviest rain is expected on Friday. The region could see more rain on Saturday, Del Valle said. The Feather River could flood the Sierra Nevada town of Portola, which is near the Nevada state line, the National Oceanic and Atmospheric Administration said.

This winter, record-breaking rainfall brought California’s long-lived drought closer to its final hour. However, it also raised the probability of large wildfires this summer, particularly those fueled by tall grasses that are thriving now but will start drying out soon, fire officials say. The potential for large fires “is expected to remain near normal through the spring, but once fine fuels dry out, there will likely be a spike in grass fire activity,” according to a report by the National Interagency Fire Center.