Fortunately, the fire never made it inside the facility and was limited to the solar panels above the building. 50 employees of the facility had to be evacuated and there have been no reports of any injuries.
Earlier this year in February, Apple said that the Mesa data center is one of their largest investments ever. The facility is expected to employ 150 full-time Apple employees and create at least 300 construction and trade jobs. Apple said that they plan to spend $2 billion to renovate the facility over a 10-year span with the purpose of turning the data center into a central "command center" for their global operations. Renovations for the facility are planned to start in late 2016.
The complex was formerly used by GT Advanced Technologies who had a previous partnership with Apple as the supplier of sapphire glass for all of Apple’s devices. The two companies had a bitter breakup and Apple eventually bought the facility when GT Advanced Technologies filed for bankruptcy.