Pool chemical incident

Mitchell Matlow with San Jose Fire Department on camera. SAN JOSE — A summer afternoon at a neighborhood swimming pool took a frightening turn Thursday, June 14, 2018 when at least 35 people, including kids, were exposed to a dangerous mixture of chemicals after a pool maintenance worker mixed the wrong products. All of the people exposed to the combination of muriatic acid and chlorine — pool chemicals that created a gas cloud at Shadow Brook Swim Club in Almaden Valley — were decontaminated and transported to hospitals, according to the San Jose Fire Department. (Dai Sugano/Digital First Media/The Mercury News via Getty Images)