On Sunday, residents within half a mile of the plastics fire in Richmond, Indiana, were permitted to return home after environmental experts declared that the air quality and other environmental factors were safe. However, the EPA remains concerned about the presence of debris, some of which has tested positive for the carcinogenic substance asbestos. The EPA has urged residents to call them if they have debris on their property and not to disturb it. Hydrogen cyanide and benzene were also detected in the fire debris, which landed near schools or in parks and private yards. Despite firefighting efforts, clouds of toxic smoke billowed from the inferno, alarming residents and putting lives in danger. Approximately 1,500 people live in the affected area, but it is unclear how many left after being ordered to evacuate. While the fire has been designated as contained, and 99% out, according to the local fire chief, Tim Brown, investigations into its cause continue.