If it's just the hezrou, the fort can maybe handle it with some casualties but no serious operational consequences, but hezrous are only mostly solitary and you can't rely on demons doing what they mostly do. The commander gives the order to read off a Sending scroll calling for a strike team before he heads out to be ready to meet the thing in battle.
#11 calls in a strike team
bughouse
"They lost people. But they're going to be able to send out enough patrols again with their wounded up."
bughouse
"I'm going to be doing a Read Weather every couple of days and sending out that news," he sighs, "we don't usually need to start doing that this early in the year and it trades off against Endures but evidently this year is not usual."