The Cocoanut Grove nightclub fire was the worst fire disaster in American history. It occurred November 1942 in Boston. 492 people were killed and 100s more injured. The nightclub was filled to double its legal capacity when it caught fire. The fire spread extremely quickly, many exits were locked and people panicked and were trampled. The tragedy led to laws banning inward-swinging doors, revolving doors without regular doors next to them and required exit signs to be visible at all times.