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The San Diego County Water Authority announced Thursday it has extended through 2047 a historic agreement to secure independent water supplies from the Colorado River. The water authority’s board voted unanimously to extend the agreement with the Metropolitan Water District to transport 2 million acre-feet of Colorado River water between 2037 and 2047. Water transferred under the agreement represented 20 percent of San Diego’s needs in 2017. The complex agreement covers water originally intended for Imperial Valley farms and requires the Los Angeles-based Metropolitan Water District to transport that water to San Diego via the Colorado River Aqueduct.

The National Weather Service has issued a red flag fire weather warning for the coast and a wind advisory for the rest of San Diego County due to the onset of four days of Santa Ana winds and low humidity. Forecasts say the winds will peak Monday night into Tuesday morning and Wednesday night into Thursday morning. The winds will blow 20 to 30 mph with gusts to 55 mph, and isolated gusts of 70 to 80 mph at a few of the county’s highest peaks.

The Metropolitan Water District of Southern California approved the repair of the forebay lining and outlet tower at Lake Mathews. The Nov. 14 MWD board vote awarded a $3,248,000 contract to J.F. Shea Construction for the work while appropriating $4,570,000 for the project. The board action also found the project categorically exempt from California Environmental Quality Act review.

As Gov. Jerry Brown was making his way through Europe last month, striking an evangelical tone about the global peril represented by climate change, California’s Air Resources Board released good news about emissions reported by companies covered under the state’s cap-and-trade system. Its report showed greenhouse gas emissions reduced by almost 5 percent in 2016, propelling the state toward meeting its ambitious goals. And for that we can thank Mother Nature.

Volunteer Paul Bareno’s yellow shirt makes him easy to see as he helps clean up a stretch of San Diego riverbed. “We were here, I’m guessing, we were here about two months ago, maybe less. And we got it pretty clean. Yeah we hit the same amount of places regularly,” said Bareno. There is plenty to clean up. There are clothes, food wrappers and at one campsite, long strips of yellow plastic tubing that’s supposed to be a temporary sandbag. None of it is surprising.