FRESNO, Calif. (AP) — The United Farm Workers of America sued California’s work safety division Thursday, saying state regulators aren’t enforcing heat regulations, leading to continued illnesses and deaths in the fields.

The lawsuit, filed on behalf of the union and individual farmworkers, alleges that the California Division of Occupational Safety and Health failed in the last two years to conduct inspections in response to some heat complaints, didn’t initiate inspections on time, and failed to cite or adequately fine violators.