I saw that when I was twelve and will never forget it. The media did us a disservice in not showing people falling out of the building. (As long as they couldn't be identified by loved ones).
One of my friends came to investigate the fire. His bank was one of the main lessees in the building and many of the bank's employees, including its manager, jumped or were burned to death. He told me that they found very few human remains in the building as the temperature had been so high there was nothing left but ashes. The building materials inside the building were so flammable that the whole building became a huge torch in a matter of minutes. The number of victims was never published in Brazil, but it had to have been several hundred. The movie "Towering Inferno" was said to have been based upon that disastrous fire in Sao Paulo.