Recently I was hurled across the existential divide that separates the millions of people around the world who have experienced a life-threatening extreme weather event from those who have not. In December 2017 unseasonal Santa Ana winds roared off a California desert across two drought-parched counties, not for the usual 48 hours but for more than a week, blowing a brush fire across 440 square miles. It was named the Thomas fire, the largest in California history.