The 1986 Chernobyl leak caused few deaths initially, but resulted in the forced relocation of more than 100, 000 Ukrainians from an area near the plant and the true human toll is still debated.
Ambassador Bridge owner Manuel Moroun, who says he stands to lose toll revenues, has sued over the proposal, arguing his company has exclusive rights over border crossings in the area.
On Monday the toll from the flooding rose again to 20, after the body of a man was found in the Lockyer Valley area and a flood-related death was confirmed in Ipswich.