The most amount of deaths by a single busfire is 1
Most deaths during a tornado are caused by debris.
Cancer
m,
Earthquakes have caused more deaths than hurricanes, and hurricanes have caused more deaths than lightning.
It is likely that marijuana has NEVER been the direct result of anyone's death, because the lethal dose is so high. However, it certainly has caused deadly accidents. The drug leading to the most deaths is by far tobacco, but only if one includes all of the deaths from tobbaco-caused diseases, such as cancer. The second most deadly on the list is alcohol.
Most od the deaths were the result of a mudflow, called a lahar.
Disease.
Mosquito
yes
nonmelanoma skin cancer, thyroid cancer & colorectal cancers
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.