Reservoirs are drying up as consequences of the Western drought worsen 

Reservoir levels are dropping throughout the West, as the drought tightens its grip on the region and intense summer heat further stresses both water supply and the surrounding landscape. Many reservoirs are at or approaching historic low levels due to lackluster rainy seasons combined with increasing temperatures due to climate change.

https://www.washingtonpost.com/weather/2021/07/09/western-reservoirs-drought-california-nevada/?itid=hp-top-table-main