No actually fires have an overall negative (lowering) effect on temperatures, because the smoke reduces the sun energy from reaching land over large areas, it’s been well established that areas affected by smoke will have lower peak temps than they otherwise would have. Except it can cause temps to stay higher overnight by preventing the heat from escaping into atmosphere.

But in terms of highest temps ever recorded.. it doesn’t seem fires would contribute to that at all, more just a consequence of the high temps (drying effect).