NEW ORLEANS (AP) — Smoke and flames shot up the side of the Superdome’s roof on Tuesday after a pressure washer being used to clean the roof of the New Orleans sports and entertainment arena caught fire.

The New Orleans Fire Department confirmed firefighters responded to flames on the building’s roof shortly after 12:30 p.m. By the time it was under control 30 minutes later, NOLA.com reported, nearly two dozen fire department vehicles and more than 50 firefighters had responded to the three-alarm incident, which was twice upgraded due to “the size, type of structure and the location.”

New Orleans Emergency Management Services said on Twitter that they were transporting one person to the hospital for “minor burns.” Emergency officials called on people to stay away from the area.

Crews were power washing the roof this week to prepare it to be painted, officials said.

“Upon further investigation it appears that a pressure washer being used to clean the roof caught fire. Damage is still being assessed,” said a statement from the Louisiana Stadium and Expedition District, which is a state board that governs the dome, and ASM Global, which manages the Superdome.

“The fire was contained to the exterior gutter system surrounding (the) Superdome, and only a small area of the roof suffered minimal damage. Pressure washing was underway to clean the roof before a planned re-coating of the entire roof itself. Any fire damage will be addressed during the re-coating process,” the management companies said.

“Initial assessments suggest that damage is superficial and there appears to be no structural damage or impact to the integrity of the roof’s exterior skin. The building’s outer skin and roof remain watertight.”

A photo posted on the city’s emergency management Twitter feed showed firefighters in the trench that separates the Superdome roof from an outer wall as they sprayed down the fire-blackened walls.

The next New Orleans Saints home game at the Superdome is scheduled for Oct. 3, against the New York Giants.

“While final assessments continue, the Louisiana Stadium and Exposition District along with the Superdome’s management company, ASM Global, do not feel the fire will impact or force any cancellation of future events,” including the Saints’ game, the management companies said.

The Saints’ final preseason home game slated for Aug. 28 was canceled due to Hurricane Ida, which made landfall the next day. Since the storm, the team has been practicing in the Dallas area. The team’s Sept. 12 game against the Green Bay Packers was moved to Jacksonville, Fla., out of concerns for the city’s wider infrastructure and Dome staff although the Dome itself was not damaged during Ida.