“We have multiple scenarios. The future one is much larger, consistent with [climate change],” he said. “In the historical scenario, the lesser one, certain parts of the Sierra Nevada see 50 to 60 inches of liquid-equivalent precipitation … but in the future event, some places see 70 to 80 and a few see 100 in a 30-day period. Even places like San Francisco and Sacramento could see 20 to 30 inches of rain, and that’s just in one month.”