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The Colorado River Basin continues to experience drought exacerbated by the impacts of climate change. The Lower Colorado River Basin is in a Tier 2a shortage for 2023. This represents a 592,000 acre-foot reduction to Arizona’s Colorado River supply, constituting 34% of Central Arizona Project’s normal supply in an average year, 21% of Arizona’s Colorado River supply and about 9% of Arizona’s total water use. Nearly all the reductions within Arizona have been taken by Central Arizona Project (CAP) water users. These reductions were determined by the CAP priority system – the result being less available Colorado River water for central Arizona agricultural users.