A persistent heat wave across California is stressing crops, including grapes and melons Temperatures in the state’s key agricultural regions have been exceeding 110 degrees. Farmers have responded with increased irrigation, using misters and fans to cool livestock and shortening daytime work hours.

The heat threatens to damage crops, such as grapes which can cook on the vine, making the fruit unsalable. High heat also increases the threat of pests, such as mites, worms and moths.

Heat stress on plants can delay harvest and with harvest crews working fewer hours due to the heat, there is more spoilage in the field. In addition, the heat is reducing attendance at farmer’s markets.

Read more about the agricultural impact of California’s heat wave here.