The Occupational Safety and Health Administration (OSHA) of United States details in its report on “safety in the construction industry” that precautions should be taken to avoid the danger of lightning to workers. In Great Britain alone, according to issue Nº. 401 of The International Journal of Meteorology, reports for over the past 30 years show work-related activities accounted for 15% of the total of deaths due to electrical discharges.