The Occupational Safety and Health Administration (OSHA) has launched its annual Campaign to Prevent Heat Illness in Outdoor Workers. For the fourth consecutive year, OSHA's campaign aims to raise awareness and educate workers and employers about the dangers of working in hot weather and provide resources and guidance to address these hazards. Workers at particular risk are those in outdoor industries, such as agriculture, construction, landscaping and transportation.

"Heat-related illnesses can be fatal, and employers are responsible for keeping workers safe," said Secretary of Labor Thomas E. Perez. "Employers can take a few easy steps to save lives, including scheduling frequent water breaks, providing shade and allowing ample time to rest."

Thousands of employees become sick each year and many die from working in the heat. In 2012, there were 31 heat-related worker deaths and 4,120 heat-related worker illnesses. Labor-intensive activities in hot weather can raise body temperatures beyond the level that normally can be cooled by sweating. Heat illness initially may manifest as heat rash or heat cramps, but can quickly escalate to heat exhaustion and then heat stroke if simple preventative measures are not followed. Heat illness disproportionately affects those who have not built up a tolerance to heat (acclimatization), and it is especially dangerous for new and temporary workers.