I'm not the greatest at grammar, but I think the very first one is incorrect. It should just be a comma, then the second just a comma as well, but the last one is correct. (I have no idea, I am sorry if you get it wrong.)
I think it’s Personification, dk not sure.
Explanation:
those poor Esgaroth people. Assuming Erebor is mainly composed of Volcanic igneous rock, I'm guessing that Smaug's fire is cooler than 1200 degC, since he didn't melt the tunnel the Dwarves were hiding in. Most minerals that comprise igneous rock begin to become molten before temperatures reach ~1200 degC.