By the end of July 2009, California was well into its third dry year in a row, reports the Earth Observatory. On average, the state’s reservoirs were running low. In particular, the San Luis reservoir had reached only 18 percent of its capacity by July 28, said the Drought Operations Center for the State of California.

The San Luis Reservoir stores water from the Sacramento and San Joaquin River Delta to be distributed through the southern Central Valley.

As water levels at the reservoir and elsewhere dropped, many water districts faced restrictions. The impact of those water restrictions on farms in the Westlands and Tulare Lake Districts is illustrated in thisvegetation anomaly image.

Source: Western United Dairymen and Earth Observatory