The federal government will impose deeper cuts on the drought-stricken Colorado River, officials said on Tuesday, reducing water deliveries to Arizona by one-fifth starting in January.

The Bureau of Reclamation announced what it called “urgent action” as water levels in the river’s two largest reservoirs continue to drop. Under the steps outlined Tuesday, Arizona will lose 592,000 acre-feet of its river allocation in 2023, which represents 21% of its usual delivery. That’s an increase of 80,000 acre-feet from the 2022 cuts.