In the latest sign of California’s improving drought picture, federal officials announced Friday that cities will receive 55 percent of their contracted water amounts this summer — up from 25 percent last year — from the Central Valley Project, California’s largest water delivery system.

Heavy rains in March boosted the amount of water in Northern California’s large reservoirs such as Shasta and Folsom, allowing farmers in the Sacramento Valley and wildlife refuges to receive 100 percent of their contracted amounts, while the Contra Costa Water District also will receive 100 percent, up from 25 percent a year ago.