A decade ago, Ben Ray had hoped to ease into retirement at his two-story wooden house nestled in the heart of the Sequoia National Forest. But the 79-year-old central California general contractor, who built homes for his future neighbors in Sierra Nevada Mountain communities such as Ponderosa and Pierpont, and his wife, Michelle, haven’t had the luxury of relaxation. That’s because hundreds of once verdant pine and cedar trees, stretching far beyond their 5 acre spread, have perished at a rate so fast he’s lost count of the carnage.

In 1987, California was at the beginning of what would be a six-year drought — the second driest in the state’s history. Fittingly, that same year Peter Gleick helped to co-found the Pacific Institute, a global think tank that would become a leader in global environmental and California water issues. In 1987, Gleick had just finished a doctorate from the University of California, Berkeley, in the Energy & Resources Group, where his dissertation was the first to study the impact of climate change on water resources.