Conversation so far:
when did the water crisis start in california
The current drought started in 2012.
What is the reason for the water crisis in California
Not only has precipitation been abnormally low, but the state has endured exceptionally warm temperatures that have sped up evaporation.
What areas in California are most affected with the water crisis
Reservoirs are drying up. Crops are wilting in the fields
What was doen in the past water crisis in California
The vast majority of precipitation happens in the north, so during the 20th century, elaborate system of canals, aqueducts, and reservoirs were built to bring water south.

Question: Where does our main source come from
Self-contained rewrite: Where does our main source of water come from in California