vapor

The first fuel truck they sent out to the plane had a vapor lock.

As the smoke rises, water vapor in the air condenses at high altitudes, creating what is known as a pyrocumulus cloud, or fire cloud.

For example, in the case of EO, highly corrosive hydrogen fluoride vapor.

The term is used among conspiracy theorists who believe that the contrails of vapor that can form behind an airplane’s engines are actually chemicals being distributed from high altitude.

He said such storms, which roll in from the Pacific Ocean carrying massive amounts of water vapor, would typically be on a larger scale.