http://www.newsweek.com/explosion-google-data-center-critically-burns-3-workers-1732178

An "electrical incident" at a Google data center in the Midwest resulted in an explosion on Monday, critically injuring three workers.

The incident occurred around 11:59 a.m. local time at one of the tech giant's data centers in Council Bluffs, Iowa, a city just over the Missouri River from Omaha, Nebraska. Three electricians were working at a power substation near the building when an "arc flash" electrical explosion happened and engulfed them, SFGate reported.