There are three different ways to cause a catastrophic flood, all use Cloud Seeding methods:
1. Static Cloud Seeding
This involves spreading a chemical such as silver iodide into clouds. The silver iodide provides a crystal around which moisture condenses. The moisture is already present in the clouds, but the silver iodide essentially makes rain clouds more effective at dispensing their water.
2. Dynamic Cloud Seeding
Dynamic Cloud Seeding aims to boost vertical air currents, which encourage more water to pass through the clouds translating into more rain. Up to a hundred times more ice crystals are used in Dynamic Cloud Seeding than the standard method. The process is considered more complex than Static Cloud Seeding because it depends on a sequence of events working properly. An unexpected outcome in one of the two stages could ruin the ability to cause a disaster.
3. Hygroscopic Cloud Seeding
This process disperses salts through flares or explosives in the lower portion of clouds. The salt crystals grow in size as the water joins them. The process holds much potential but requires further research.