Right-wing influencers and lawmakers are spreading conspiracy theories about the cause of deadly floods in central Texas.

Disinformation around a “weather weapon” and cloud seeding is being widely promoted by everyone from anti-government extremists to GOP influencers—leading to real-world consequences.

First reported by the Houston Chronicle, cloud seeding involves releasing silver iodide into clouds to increase rainfall under specific conditions. According to the Texas Department of Licensing and Regulation, it is used in select areas of West and South Texas, typically during dry seasons to enhance precipitation.