But celebrities also urge their fans to take action against the climate crisis.
On Twitter, many people tweeted #PrayforAmazonia hashtag – including Jenner-Kardashian's family matriarch Kris Jenner.
"It's devastating !!! For the lives of humans, plants and animals and our planet," she said on a video showing the size and importance of the rainforest.
The Portuguese top football star Cristiano Ronaldo was one of the sports stars who made the crisis known.
"The Amazon rainforest produces more than 20% of the world's oxygen and has been burning for 3 weeks, and it is our responsibility to help save our planet," he said.
The Brazilian Space Exploration Center (INPE) announced this week that the number of fires in Brazil is 80% higher than last year. According to Christian Poirier, program director of the non-profit Amazon Watch organization, this year's destruction is "unprecedented" compared to previous years.