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.

Cloud seeding couldn’t have caused the floods that killed more than 100 people, experts say. But rumormongers suggested a link to one company’s work.