If you want to understand the drought conditions better, I implore you to watch this Ted talk by environment scientist David Keith:
http://www.ted.com/talks/david_keith_s_surprising_ideas_on_c...
To sum it up, governments are engaged in cloud seeding to fight climate change, and they're staying silent on the issue because informing the public is a moral hazard.
As a side effect of cloud seeding, certain areas are bound to develop less rain clouds. This causes drought conditions.
Spraying chemical compounds over populated areas also has environmental impacts.
https://www.youtube.com/watch?v=O4WhYKP83zo
"On July 15th, 2014, citizens from Northern California rallied to create the largest attendance ever at the Shasta County Supervisors chambers (400+, chairman Les Baugh confirmed this attendance record at the start of the meeting). The primary purpose of this meeting was to present information that proves there is a very dire heavy metal contamination and UV radiation issue across the Shasta County region (and the world). A list of 10 experts presented data to the board to confirm the legitimacy of the concerns being addressed. At the end of the presentation, the board voted unanimously to investigate the heavy metal contamination and passed resolutions accordingly."