What seems to be the most serious consequence caused by the fire?

(27) A fire has broken out in the festival district of the Brazilian city of Rio de Janeiro, destroying more than 8 ,000 costumes prepared for the event. Four warehouses were damaged in the blaze at Samba City, as well as a samba school and festival museum. One man was reported injured in the fire, which spread quickly because of the quantity of materials that are easily set on fire. (28) According to reports, some workers were in the warehouses when the fire broke out at 7:00 local time, hut most employees had not yet begun work. The fire sent plumes of smoke into the sky above Rio de Janeiro. Some 90% of costumes in the damaged warehouses have been destroyed, according to the O Globo newspaper. The cause of the blaze is not known.