As fires continue to burn the Amazon rainforest at a record rate, Colorado-based Global SuperTanker sent its Boeing 747-400 firefighting plane to Bolivia on Thursday to aid in firefighting missions.

The company’s CEO, Dan Reese, told The Denver Post that the plane — in addition to 14 crew members — arrived in the South American country early Thursday morning and began combating the fires on Friday.

Reese told PEOPLE on Monday that he plans to bring a 15th crew member out, and that the plane and its crew plan to stay and help for at least two weeks, after which they can stay longer if the country needs.

On Sunday, the SuperTanker successfully completed four missions, per a video shared on their Twitter.

Reese confirmed with PEOPLE on Monday that they have completed a total of 12 missions since arriving in Bolivia. However, he thinks it’s going to take an act of nature to end the devastation.

“In all honesty, I think it’s going to take rain,” he said. “We are going to do our part to help them get the fires they can, where they can get people, but as extensive as these fires are across this continent, it’s unfathomable to imagine these fires.”

Global SuperTanker's Boeing 747-400 firefighting plane in Bolivia | STR/AFP/Getty More

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Last week, the B747-400 SuperTanker was requested by Bolivian President Evo Morales, who hoped that the plane could help the firefighting efforts in Bolivia’s Chiquitania region, according to CNN.

Known as the world’s largest firefighting tanker, the B747-400 can dump up to 19,200 gallons of water per mission, according to the company’s site.

“When we were flying from 38,000 feet, it was just unbelievable [seeing] the scene, the numbers of fires and size from that altitude across the country,” Reese told PEOPLE. “There is a lot of fire. My guess is that we were looking at the fire in other countries as well.”

“Our missions have been down on the Paraguay-Brazilian border, so it’s kind of across the country and those distances from the airport,” he added. “We are working out of the airbase [and working] from 130 miles to 360 miles.”

Morales shared a video of the SuperTanker during a mission on Saturday, thanking everyone who has helped in the efforts to combat the fires.

El Supertanker y nuestros helicópteros trabajan para sofocar el incendio. Agradezco el esfuerzo de tantos compatriotas, hombres y mujeres, que trabajan en esta dura tarea. Enfrentamos juntos esta batalla contra el fuego. #UnidadEnLaAdversidad pic.twitter.com/NkZCaYvQs6 — Evo Morales Ayma (@evoespueblo) August 24, 2019

#SuperTanker final sortie of the day. #BoliviaFires



Video credit to Global SuperTanker Services, LLC pic.twitter.com/RjJ5q18LOo



— Global SuperTanker (@GlobalSuperTank) August 25, 2019

“The Supertanker and our helicopters work to put out the fire,” he wrote. “I appreciate the efforts of so many compatriots, men and women, who work on this hard task. We face this battle against the fire together.”

The Amazon, the world’s largest tropical forest, spans eight countries, including Bolivia, with nearly 60 percent of the forest in Brazil, according to Reuters. It has been engulfed in flames for a record number of weeks.