Storms swept through California in recent weeks, drenching striking teachers and blocking roads with debris flows in recent burn areas, but they weren’t all bad: The state’s reservoirs are healthy and full, a good sign for the water supply. Nearly all California reservoirs are at or above average levels. Overall, 580 billion gallons of water were added across the state since Jan. 1. Some major water sources, such as the San Luis Reservoir in Merced County and Lake Perris in Riverside County, are near capacity.