The cause of a fatal Christmas day fire in Lyon County remains under investigation. Crews from Central Lyon County Fire Protection District were called to a home in Dayton around 7 a.m. on Monday. When firefighters arrived, the home was already engulfed in flames. A man was found inside the home and firefighters were able to pull him from the structure. However, he died from his injuries. He has been identified as 73-year-old William Storrs.