For, behold, the LORD will come with fire, and with his chariots like a whirlwind, to render his anger with fury, and his rebuke with flames of fire. The Lord will come with fire "Jehovah shall come as a fire" - For באש baesh, in fire, the Septuagint had in their copy קאש kaesh, as a fire; ὡς πυρ.
To render his anger with fury "To breathe forth his anger in a burning heat" - Instead of להשב lehashib, as pointed by the Masoretes, to render, I understand it as להשב lehashshib, to breathe, from נשב nashab.