There was quite a bit to react to here...
We advanced the invasion a bit now.
They've taken the eastern gate and are advancing along the battlements. Not sure yet if they've taken any other gates. 
As per imperial policy, all civilians are being escorted to safety. They'll not be allowed to leave, but they will not be harmed unless they succeed in harming soldiers. Even then, the Imperials prefer to lock up offenders rather than kill. Not that they won't kill, of course. 

Any evokers they might capture will be held elsewhere. 

Even if they might not yet have surrounded the whole city with companies of infantry, there will be numerous Mauler Cavalry companies making up a cordon further out around the City. We're not sure on the Map's scale or the distance to the big lake/inland ocean, but if it is relatively close to Amaryth and if anyone's to escape, it might be most reliable to escape by boat/ship. They may have brought an entire army and all it needs through the tunnels, but they have not brought any boats yet, let alone launched any.