Hazardous materials released in Houston warehouse fire

HOUSTON - Emergency officials say hazardous materials have been released into the air from a warehouse complex fire in Houston that's generating towering plumes of black smoke.City officials issued an alert Thursday ordering people in nearby homes and businesses to stay inside, close all windows and shut off any air conditioning.The Houston Fire Department didn't immediately say what hazardous materials may have been released during the fire and explosions that rattled the industrial area. But t