CGTN America is examining the challenges facing students, families and educators as the new school year begins. From extreme heat threatening student safety to teacher shortages affecting classrooms nationwide, American schools are facing unprecedented pressures. We begin our Back to School series with a story that hits close to home for millions of families: the hidden dangers of extreme heat in school zones. New research reveals that about 76% of students across the country attend schools in areas where buildings and pavements add at least 13 degrees Celsius of heat. In Florida, the numbers are even more alarming. CGTN’s Nitza Soledad Perez reports from Miami on how one mother’s tragedy is helping save lives.