From the Document: "The U.S. Department of Agriculture (USDA) offers several programs to help farmers recover financially from natural disasters, including drought and floods. All the programs have permanent authorization, and one requires a federal disaster designation (the emergency loan program). [...] The federal crop insurance program offers subsidized policies designed to protect crop producers from risks associated with adverse weather, as well as weather-related plant diseases and insect infestations and declines in commodity prices. Policies must be purchased prior to the planting season."
CRS Report for Congress, RS21212
Congressional Research Service: https://crsreports.congress.gov/