Final answer:
In the United States, deaths from lightning have steadily decreased since the 1940s thanks to better forecasting, increased public awareness, and fewer outdoor jobs.
Step-by-step explanation:
In the United States, total deaths from lightning per decade have been decreasing steadily since the 1940s. This decline is attributable to a combination of factors including better weather forecasting, public awareness, safety campaigns, and a reduction in the number of people working outdoors due to shifts in the labor market. While lightning still poses a significant risk, the measures taken to protect the population and disseminate safety information have been effective in reducing fatalities.