Contamination by radioactive iodine can cause thyroid cancer, as it was the case after the 1986 Chernobyl nuclear power plant accident.
https://valentin.vincendon.com/essays/chernobyl-wildfires-radiation-risk
origin - https://www.pipiscrew.com/2020/04/chernobyl-wildfires-radiation-risk/ chernobyl-wildfires-radiation-risk