Santa Clara County had an active cloud-seeding program from 1954 through 1994.[1]
Santa Clara County used to be a major agricultural area.
The goal is not to create rain, but to move it. Get the clouds to dump over the agricultural areas instead of the inland mountains. It worked, a little. But
there was a concern that it was making wildfires worse, by doing what it was intended to do and thus making the inland forests more dry.
[1] https://s3.us-west-1.amazonaws.com/valleywater.org.us-west-1...