After a generator is repaired, The Entity blocked the generator with the most progress for 30 seconds.  You see its white aura during this time.

Once the Exit Gates are powered, Terminus activates:

All Survivors, who are either injured, dying, or hooked, suffer from the Broken Status Effect until the Exit Gates are opened.
This effect lingers for an additional 20/25/30 seconds after the Exit Gates are open.

Survivors within your Terror Radius suffer from inefficiency:

When using an Item, its Depletion rate is increased by 80/90/100 percent.

Gain a notification when a Survivor begins sabotaging a hook.

While carrying a Survivor, see the aura of any survivor within 6 meters of a hook.