My Vault just got raided by Deathclaws.
My own fault for expanding past 60 to early, yes?
Nope.
I was sitting at 36 dwellers, having unlocked the endurance training room.
Raider Raider Raider Raider DEATHCLAWS Molerats!
Suffice to say, with the incident rate and 4 raider attacks just minutes before, the Deathclaws ran rampart. I managed to only loose one dweller, but everyone was on precariously low health.
Then, 1 minute later - mole rats.
No power, no food, no stim packs, but enough water, yey! The molerats killed of my vault.
So whatever you do, be aware that Deathclaws can attack at a brutally low level, either 35 or 36.