A transformer caught fire, causing an explosion at the Hoover Dam Tuesday. Officials have said there were no injuries. The blast came from the base of the 726-foot-tall dam, and had tourists running for safety. The Hoover Dam supplies electricity to three states and sits on the border of Nevada and Arizona. The fire started inside the turbine house.

Lake Mead, the reservoir created by the dam, is currently at historically low levels due to an ongoing drought in the area. The area is also experiencing a heat wave.

A tourist caught video footage of the explosion.

Boulder City Fire Department, which is nearby, responded to the blaze. Still, officials said the fire was extinguished when they arrived, adding that inquiries about the explosion should be directed to the federal Bureau of Reclamation, which operates Hoover Dam.

‘There is no risk to the power grid, and power is still being generated from the powerhouse,’ said Jacklynn L. Gould, the regional director for the federal Bureau of Reclamation.

Another bureau spokesperson commented,

‘We are investigating the cause of the fire and will provide additional updates as they are available,’

The Hoover Dam has been tightly protected against attacks. It is considered a critical infrastructure and an iconic American structure.

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