So my players have managed to escort the refugees to the nearest settlement, but what's this? the power to the warding devices has been sabotaged! The settlement is wide open to animal attacks!

They'll have to defend it until the repairs can be done and the power restored!

Just in case you are wondering; Most fauna on Shawl uses electrosense to find food, so the settlers put up electrostatic generators around their towns to ward off the animals :)