Read here. The leftist, environmental, Democrat crazies, who are currently in the process of torching the last remains of that once great state of California, should be made aware that California has a natural habit of getting warm and cold without the help of human CO2. You're overreacting dudes. And Mr. & Ms. Hollywood celebrity, learn some climate history, please.
"McGann (2008) analyzed a sediment core retrieved from the western portion of south bay near San Francisco International Airport ....researcher reports that "benthic foraminiferal abundances, stable carbon and oxygen isotopes, and Mg/Ca ratios suggest that the climate of south bay has oscillated numerous times between warm and dry, and cool and wet conditions over the past 3870 years," and that "both the Medieval Warm Period [MWP] and the Little Ice Age [LIA] are evident."....notes that "near the top of the core" foraminiferal abundances suggest that, "once again, regional warming has taken place." However, that warming does not appear to have returned the region to the level of sustained warmth it enjoyed during the peak warmth of the MWP."
As an aside: Evidence of destruction that leftists/environmentalists/Democrats wreak on a state's economy when given power (if there are any sane Californians left, move to Texas). (click on image to enlarge)