PolitiFact | Cloud seeding could not have caused the disaster because the process increases precipitation only by a small amount, experts said.

There are reports some cloud seeding occurred a few days before the Texas flash flood. But it’s important to understand that cloud seeding has a relatively short-term effect in that a certain cloud is seeded and perhaps turns into one individual rain cloud or even a thunderstorm. The increased rainfall would not last for days.

Regardless, the process cannot create storms out of thin air. Ken Leppert, an associate professor of atmospheric science at the University of Louisiana Monroe, said it “had absolutely nothing” to do with the flash floods in Texas.