A large explosion rocked the Hoover Dam during a tour of the facility early Tuesday, dramatic video shows.

A fire broke out at the Hoover Dam on Tuesday at about 10 a.m. local time when a transformer caught fire, sending plumes of black smoke into the air, according to the Bureau of Reclamation.

Everything to know about seeing Hoover Dam, including the security checkpoint, whether there's a lot of walking and how to get dam-tour tickets.

Discover the history, engineering, and natural beauty of the Hoover Dam. Plan your visit with tips, tours, and nearby ...

An estimated 7 million people visit Hoover Dam every year. Here are some tips to those who want to see the massive engineering feat.

Everything to know about seeing Hoover Dam, including the security checkpoint, whether there's a lot of walking and how to get dam-tour tickets.

Understand the impact of climate change on Hoover Dam and its hydropower generation capacity in the Colorado River basin.

Everything to know about seeing Hoover Dam, including the security checkpoint, whether there's a lot of walking and how to get dam-tour tickets.