This summer's record-breaking heat has taken its toll on road construction and roofing crews, and the Occupational Safety and Health Administration has launched a campaign against heat-related illnesses, especially for construction crews. "Every summer, dozens of fatalities are associated with heat," said David Michaels, the Labor Department's assistant secretary in charge of OSHA. "Water. Rest. Shade. The work can't get done without them, and it's important for all employers and workers to be aware of this."