How Much Water Is in Lake Shasta, California Reservoirs in 2026?

Lake Shasta and California’s other lakes and reservoirs got a big boost from wet holiday storms. Nearly two weeks into 2026, all of the state’s 17 major reservoirs are brimming above their 30-year average after atmospheric rivers dumped heavy rain on much of the state starting the week before Christmas, lasting into Wednesday, Jan. 7.

Both the rain and the rainwater draining from the ground into lakes helped raise reservoir levels, the National Weather Service said.