A study published in late May projected that if Arizona’s electric grid fails during a summer heat wave (like the one we are in right now), it could lead to more than 12,000 deaths and send nearly 800,000 Phoenix residents to the hospital for heat-related illness. And that’s just within the City of Phoenix, not counting the rest of the state. Those are astronomical numbers, and especially unsettling given that the past eight years have been the hottest on record and the next eight will likely be even hotter.