Chances are if you live in Utah, you've visited Hoover Dam in nearby Nevada at some point. Today, a tourist captured an explosion on video. FOX News reported that "an account for Boulder City, Nevada later tweeted that the fire was extinguished before the Boulder City Fire Department arrived on the scene. Hoover Dam holds Lake Mead, which is a man-made lake. There have been no further reports of the structure being threatened or weakened by the explosion, but this is obviously a developing story. Watch the tourist's video below.