New research finds people are more vulnerable to heat stress than previously thought

Scientists say we need a new standard to explain how heat is harming our bodies. New research shows the threshold may be lower than experts thought. National environmental correspondent David Schechter reports.

New research finds people are more vulnerable to heat stress than previously thought
Scientists say we need a new standard to explain how heat is harming our bodies. New research shows the threshold may be lower than experts thought. National environmental correspondent David Schechter reports.