The most amount of deaths by a single busfire is 1
Most deaths during a tornado are caused by debris.
m,
In the United States, there is an average of about 60 people that die every year due to tornadoes. Most deaths are caused by flying/falling debris.
Earthquakes have caused more deaths than hurricanes, and hurricanes have caused more deaths than lightning.
Most od the deaths were the result of a mudflow, called a lahar.
Disease.
Mosquito
yes
1517 deaths were caused by the Helmsman of the Titanic. I'd say that one's pretty hard to beat...
The eruption of Cracatoa. Krakatau is an island volcano along the Indonesian coast and is not located in the U.S. Volcano deaths in the U.S have been very small. I do not know the answer to which caused to most deaths.
Smallpox
tombora from Indonesia