I feel the Earth move under my feet: About half an hour ago, an Orange Line train in Chicago derailed in the South Loop. Not many details are available, but the Tribune reports:

Six ambulances were sent to the scene of a derailed northbound CTA Orange Line train along elevated tracks in the South Loop, officials said.

The derailment was reported around 11:40 a.m. near Roosevelt Road and Wabash Avenue, but there have been no reports of injuries, fire department spokesman Kevin MacGregor said.

Power was temporarily shut off along the tracks, and the CTA was providing a shuttle bus for stranded commuters, said Chicago Transit Authority spokeswoman Wanda Taylor. She said service along the Orange and Green Lines would be affected by the derailment, but could not elaborate.