“Shortly after noon today, our Legacy-North Valley campus was evacuated when administrators were notified that a potentially hazardous respiratory irritant had been released indoors during an 8th-grade science class. The building HVAC system was immediately shut down to prevent further spread of the irritant. We are not aware of any students becoming ill due to exposure. Out of an abundance of caution, however, EMS and the North Las Vegas Fire Department’s Hazmat team were contacted to assess the situation. Health authorities informed administrators it was safe to return to the school building at approximately 2:20 p.m. this afternoon.