What do rock walls across Delta water channels, brown lawns, bans on hoses, and red flag fire warnings have in common? California’s deepening drought. Up in the Delta, the state is once again piling up rocks in False River to prevent salty ocean tides from intruding too far inland, and too close to intakes for the state’s water supply pumps (there’s no enough pushback from snowmelt and river outflow this year to keep things fresh!) Meanwhile, many water districts around the Bay Area have already called on their customers to reduce their water use by 10-25%, with Marin going first in April.