Although OSHA does not have a specific standard that covers working in hot environments, the Occupational Safety and Health Act requires places of employment that are "free from recognizable hazards that are causing or likely to cause death or serious harm." OSHA’s efforts to require employers to report occupational fatalities and certain injuries in a timely manner lack “sufficient guidance on how to detect and prevent underreporting,” the Department of Labor Office of Inspector General states in its semiannual report to Congress. To better protect workers exposed to respirable crystalline silica, OSHA has issued two new standards: one for construction and another for general industry and maritime. OSHA will begin enforcing most provisions of the standard for general industry and maritime on 23 June. Millions of workers are exposed to noise in the workplace every day and, when uncontrolled, noise exposure may cause permanent hearing loss.