Complex sentence: In the United States, the storm was responsible for 300 deaths and the loss of electric power to over 10 million customers, it is purported to have been directly experienced by over 130 million people, about 40 percent of the country's population at that time.
Split into simpler sentences: In the United States, the storm was responsible for 300 deaths and the loss of electric power to over 10 million customers. It is purported to have been directly experienced by over 130 million people, about 40 percent of the country's population at that time.