A shift in wind led to increased activity on Tuesday, as firefighters continue to battle the Mosquito Fire in Placer and El Dorado counties. The fire jumped the Middle Fork of the American River, threatening the community of Foresthill.  State health officials are advising Californians to get a flu shot, in addition to the COVID-19 vaccination or booster. Reporter: Nimah Gobir, KQED  If you lost your job during the pandemic and you still aren't making as much as you used to, there's a new state grant that could help boost your professional skills. And -- hopefully -- your earning potential. Reporter: Mikhail Zinshteyn, CalMatters Like other big California ports, L.A., Oakland, San Diego, the Port of Long Beach is filled with fleets of big, loud diesel trucks. They’re vehicles that carry cargo containers from the docks to warehouses and logistical centers inland. But there's a new type of vehicle that's supposed to become much more common at California ports in the coming years: battery-powered big rig trucks.  Reporter: Saul Gonzalez, The California Report More than a dozen California Democratic Congressmembers are calling on the federal government to investigate complaints by immigrant detainees, who say they've been held in solitary confinement for supporting a labor strike.  Reporter: Farida Jhabvala Romero, KQED Strawberries are one of California’s biggest and most delicious agricultural moneymakers, but they are also vulnerable to diseases that can be devastating for growers. But now, California researchers have made a key discovery to help fight one of strawberries’ biggest threats. Reporter: Benjamin Purper, KCBX  Learn more about your ad choices. Visit megaphone.fm/adchoices