Dairy cows in California have been dying by the hundreds this week after ten straight days of 100-degree temperatures. The Associated Press reports that a combination of sweltering temperatures, growth in the state’s dominant $5 billion dairy industry and fewer plants to properly dispose of the animals have forced several counties to declare a state of emergency.

San Joaquin County, which also has declared an emergency, estimated that its dairy farms were losing a total of 120 cows per day from the heat. Individual dairy farmers could lose about 2 percent of their herd this year, according to industry experts.