"At approximately 2:12pm EST, the generator was reengaged and teams are assessing stability to bring some portion of cooling back on-line. With mitigation efforts temperatures have stabilized in a range of 95-100 degrees Fahrenheit and have been generally unchanged over past 2 hours at those levels," Zayo said in the post.

Zayo said it also has other contingencies in motion, including a 2MW generator that is in transit from New Jersey to the facility in New York City.

"If building infrastructure is not restored, Zayo's intention would be to tie its 7th floor services and cooling infrastructure directly to this back-up power source and maintain this through full commercial utility restoration," the company said.

Delivery of the generator is expected to take 2.5 to 3.5 hours depending on traffic.

A Zayo spokesman was not immediately available to comment on the status of the effort.