The report’s findings were unequivocal: Given the current pace of water diversions, the San Francisco Bay and the Delta network of rivers and marshes are ecological goners, with many of its native fish species now experiencing a “sixth extinction,” environmental science’s most-dire definition of ecosystem collapse. Once a vast, soaked marsh and channel fed by the gushing Sacramento and San Joaquin rivers, the Delta has diminished dramatically over the previous century as those rivers and their mountain tributaries have been diverted to irrigate Central Valley farms and Bay Area urbanity.

Gusty winds and a slight chance of rain are in the forecast for parts of San Diego County Monday, but the weekend storms that generated record-breaking rainfall and prompted numerous weather advisories have moved out of the region. In a 48-hour period ending just after 9 p.m. Sunday, the back-to-back weekend weather systems dropped an inch of snow on Mt. Laguna and half an inch on Palomar Mountain.

Weekend rain left San Diego soggy on Sunday, with slick roads and snarled traffic in some places but no reports of serious flooding. There were, however, lots of rainbows. The possibility of a few more scattered showers remains on tap for the region through Monday, meteorologist Stephen Harrison of the National Weather Service said. Back-to-back storms over the weekend brought 0.28 of an inch of rain to Lindbergh Field as of 4 p.m. Sunday. Mount Laguna and Palomar Mountain also got a light dusting of snow, according to the weather service.

The Vallecitos Water District, which provides water in and around San Marcos, told state regulators that demand for water will soon exceed its supplies. The state believes the district messed up the numbers by overestimating demand, but the report is threatening new development around San Marcos and worrying residents.

Hoping to create another water source in south Orange County, five water districts have partnered to fund and build a $107 million treatment plant that will provide drinking water for most of the region beginning next year. The Baker Water Treatment Plant, on Biscayne Bay Drive in Lake Forest, is expected to begin operating in January. The five-acre plant will provide an estimated 28.1 million gallons of drinking water per day to about 63,300 homes, Irvine Ranch Water District officials said.