The annual snapshot of California’s electricity generation shows how much drought conditions can affect the state’s power mix.

In-state hydroelectricity generation in 2020 dropped 44.3 percent from the year before, according to numbers recently released by the California Energy Commission. All told, 21,414 gigawatt-hours came from a combination of the state’s large and small hydro power plants — significantly lower than the 38.494 gigawatt-hours hydro delivered in 2019.