average american, are consuming more than 300 gallons of california water each week by eating the food that is produced here. >> these kinds of crops, kinds of stuff like almonds which you've got, cantaloupes, they -- this is the climate they need. they don't want rain. >> right. they don't like rain during their season. they are take like the people in california. we like the sun all summer long. we like it warm and the crops are the same way. we want the rain in the winter. we want it in the mountains 400 miles away. that's where they capture is and bring it to us. these crops, because they're not going to get any rain, they need water so we irrigate them. >> reporter: where does the water come from to produce this food? much of it comes from here, the sierra nevada mountains where every spring the melting snowpack replenishes the state's crucial reservoirs. right now that snowpack is at historic lows. that means the state's reservoirs are in trouble. >> i'm standing in front of peter's canyon reservoir and