Teenagers sprinted from the scene after the fire began, desperately seeking help. Others carried injured and burned friends away in their arms.
Many of the victims were under 20 years old, including some minors. About half of those killed were men, about half women.
The party was organized by students from several academic departments from the Federal University of Santa Maria. Such organized university parties are common throughout Brazil.
"There was so much smoke and fire, it was complete panic, and it took a long time for people to get out, there were so many dead," survivor Luana Santos Silva told the Globo TV network.