What do you mean by M&M? Did the overnight raids in Tokyo also kill 80,000 people? I don’t know the numbers for Tokyo but that would sound surprising.
Those directly killed and injured and those indirectly killed and injured.
Water and food supplies were disrupted and polluted, infections followed, etc.
As someone else linked and as I stated the scale of each event was very similar.
See also Kurt Vonnegut's accounts of the Dresden firebombing he lived through as a US PoW in Europe some months earlier.
LeMay and his ilk were monsters, eager to rain destruction down with any tool available.