For over a hundred years, the Hetch Hetchy reservoir has been the primary water source for the farms in California’s Central Valley and the residents in the San Francisco Bay Area.
But the glacier that is the source of the water in the Hetch Hetchy reservoir is melting in the warm weather we’re experiencing right now. A Park Ranger we met said the latest estimates are that we’ve got about 20 more years before it disappears.
Gradually, then suddenly.
That’s the challenge that lies ahead for all of us with the warming climate. The most devastating changes happen gradually at first.
It may not feel urgent to care and to take actions that make things better today.
But this is exactly when such action is most effective.