A massive explosion at a factory on the outskirts of Bangkok has damaged homes in the surrounding neighborhoods and prompted the evacuation of a wide area over fears of poisonous fumes from burning chemicals and the possibility of additional detonations. Styrene monomer, a hazardous liquid chemical used in the production of disposable foam plates, cups and other products, can produce poisonous fumes when ignited. Chailit said officials were trying to move all people out of the area, including doctors and patients from the neighborhood's main hospital where many of the casualties were initially treated, over fear of the fumes and...