Nebraska is suing Colorado over the amount of water it draws from the South Platte River, the latest in a long history of water rights disputes between the states that have been left increasingly dry by climate change.

Nebraska officials on Wednesday announced a lawsuit against Colorado, alleging the Centennial State is allowing “unlawful water diversions” from a transboundary resource. Nebraska Gov. Jim Pillen (R) and state Attorney General Mike Hilgers (R) accused Colorado of threatening Nebraska’s water supply along the South Platte River in multiple ways.