Patch 1.013 went live just yesterday but it appears that the emergency maintenance is in response to issues caused by the patch. To be specific, pursuit related issues, like pursuit resetting. Players seem to be actively completing objectives for pursuits and immediately lose that progress.
This issue has somewhat been present before the patch with contracts and particular pursuits like Ark Hunting as a Way of Life. However, there is no word on whether all pursuit resetting bugs will be fixed with this emergency maintenance.
UPDATE: PC, Xbox 360, and PS3 servers are back up. Pursuits should track correctly now. Simply try to progress one and it should update automatically with the correct number. The Freight Yard competitive map has been taken down again.