Car crashes rise, test scores plummet: The hidden ways extreme heat affects our bodies and our minds

The health impacts of heat waves go beyond things like dehydration or heat stroke.

Summer has just started, and already, cities across the country have seen heat waves and record-breaking temperatures: 96 degrees in Bangor, Maine; 98 degrees in Boston; 101 degrees in Albuquerque; a record-tying 117 degrees in Phoenix.