Overview

• Nearly 800,000 Phoenix residents would need emergency care if the power went out during extreme heat.
• Many major cities face high risks of widespread blackouts and heat-related illnesses.
• Overlapping heat waves and blackouts could lead to a spike in deaths and hospital visits without preventative measures.
• Planting trees and installing reflective roofs might help cities avoid catastrophe during prolonged heat and power loss.
• Climate change will make heat waves longer and hotter, exacerbating these threats