An explosion on the Texas Tech University campus in Lubbock set off fires and power outages Wednesday, leading school officials to issue evacuation orders for several buildings and cancel classes for the rest of the week.

The explosion came from a manhole on campus near a substation, causing power outages in the area and at the Texas Tech Health Sciences Center, officials said.

Texas Tech and Lubbock officials have provided a timeline and preliminary details as to what led to the overnight fires and explosions on campus.