Servers on Fire (Score 2, Informative)

According to the Wired article, their servers may have actually lit on fire.

...the organization's hosting center in Sweden was also struck by a denial-of-service attack, after which a fire erupted in the center as well.

D-O-S, or slashdotted? And is there a difference, from the perspective of someone whoose servers have flames shooting out of them?