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The new leader of the region’s leading watchdog group for water quality is putting elected officials on notice that pollution from businesses could land local governments in court. “We get screwed because the cities are not doing enough to control the industrial pollution,” said Matt O’Malley, executive director of San Diego Coastkeeper, referring to the intractable problem of stormwater runoff contaminating the region’s streams, beaches and other waterways.

You can stop dreaming about a white Christmas. We’re going to have one. The second storm of the week will arrive in San Diego County Friday night and will drop 4’’ to 6’’ of snow above the 4,500-foot level by noon on Saturday — Christmas Eve. The National Weather Service says lower regions — including Julian — will get an inch or two of snow. Most of the white stuff should still be on the ground on Sunday — Christmas Day. The system will push ashore from the northwest and deposit an inch or more of rain along the coast, and 1.5’’ to 2’’ across the eastern foothills.

One by one, big trees are disappearing, the sound of songbirds replaced by the buzz of chain saws and crews cleaning up dead branches. According to the U.S. Forest Service, 102 million trees have died in forests across California since 2010 due to heat, drought and infestation from beetles and other bugs. Many heritage oak trees in the Santa Monica Mountains and surrounding open spaces are turning brown and falling over.

A water and power district east of San Diego is suing the University of California over records related to a legal opinion that supports Gov. Jerry Brown’s plan to expand the state power grid across the western United States. The lawsuit, filed last week in Alameda County, said university officials refused to turn over documents that three law professors relied on to produce the study. The opinion was commissioned in March by the California Independent System Operator, or CAISO, the government nonprofit that manages most of the the grid.

With two winter storms set to hit the region this week, San Diego County officials reminded residents of unincorporated areas Wednesday that they can pick up free sandbags to help protect their homes, neighborhoods and streets from flooding and erosion. “The region is still suffering through record levels of drought this year,” county officials said in a statement. “Because of that, rains could trigger erosion and even debris flow, especially in areas that aren’t covered by lawns, trees, shrubs and plants.”