Revelations 9:18

Revelation 9:18By these three was the third part of men killed, by the fire and by the smoke, and by the brimstone, which issued out of their mouths.

*brimstone is defined as both sulphur and incense. I therefore surmise it to be the stench, what lingers afterward.

“Fire”, symbolic of the cause, which is the initial catalyst; “Smoke” could symbolize the effect, which is the immediate ramifications of it; lastly, “Brimstone” could symbolize the aftermath and the ripple effect. 

For example:  a large explosion and the immediate death of people at ground zero. The explosion also released a deadly disease. Many who die are also in key roles in society. Others die, not from the initial explosion, or the outbreak but from starvation as a result of little to no food being shipped into cities; illnesses: Because many have died as a result of the first two waves, there are fewer doctors and healthcare professionals left to treat the elderly, sick and those with chronic illnesses. Also key to remember is most doctors and healthcare professionals left alive will be taken or sequestered to treat the rich, well to do, and prominent citizens who are still living. The most deaths WILL occur in the poorer and impoverished communities; Or because electrical grids were shut down due to first wave, as a product, some people’s death is directly related to not having electricity, horrible sanitary conditions or something similar. Another ripple can be the desperate and hungry people that are left as a result of the first two waves, attempting to steal and someone dies as a result.