Lord Overheat is a rogue Fire Elemental from World of Warcraft who acts as a boss in the Stormwind Stockades. It is likely a follower of Ragnaros he is obsessed with fire and seeks to burn everything (a trait shared which many of his kind). As an elemental he has access to considerable pyrokinetic power such as Rain of Fire. Otherwise it is not a terribly difficult encounter. The wardens shut him away in the Stockades for offing urbanites. He is found at the end of the Stockades wing.
Lord Overheat and his minions have taken over a section of the Stormwind Stockades after the torrent jam. The adventurers may brave the rogue elemental infesting the hallways to try and take down Lord Overheat while also making their way to the true villain of the Stormwind Stockade encounter, Hogger.