What is cloud seeding? Cloud seeding has become a regular scapegoat for devastating floodingCloud seeding has become a regular scapegoat for devastating flooding events. After horrific flash floods in central Texas killed at least 120 people over the July 4th weekend, a flurry of social media posts blamed cloud seeding. But the backlash against cloud seeding has been particularly intense in the aftermath of the deadly July 4th flash floods. Cloud seeding does not add more moisture to the atmosphere than what’s already present, Swain explains in his YouTube office hour.