"SACRAMENTO, Calif. — California’s reservoirs are so dry from a historic drought that regulators warned Thursday it’s possible the state’s water agencies won’t get anything from them next year, a frightening possibility that could force mandatory restrictions for residents.
California has a system of giant lakes called reservoirs that store water during the state’s rainy and snowy winter months. Most of the water comes from snow that melts in the Sierra Nevada mountains and fills rivers and streams in the spring.
Regulators then release the water during the dry summer months for drinking, farming and environmental purposes, including keeping streams cold enough for endangered species of salmon to spawn."