Revelation 8: 7: The first angel sounded, and there followed hail and fire mingled with blood, and they were cast upon the earth: and the third part of trees was burnt up, and all green grass was burnt up.
John (he recorded Revelation) may have described a Coronal Mass Ejection (CME) from the Sun hitting the Earth.
The surface of the Sun consists of dense, super-heated plasma and is in effect a ball of liquid fire. The Sun has always emitted CME’s, but should a CME of an unprecedented magnitude strike Earth, then this dense superheated plasma would push away part of Earth’s atmosphere and expose the stratosphere to the -101 degrees Celsius temperature of Space which would instantly crystalize the moisture within the stratosphere.
As the CME pressure wave continues to push through the atmosphere, it would compress the ice crystals into balls of hail; this is what is perhaps being described in Revelation. But before a third of the earth is burnt, there first fell “hail and fire” (seemingly contradicting states of matter which are understood when compared with a CME).
As the CME continues into the stratosphere, it would then vaporize all planes, birds and flying insects, thus confirming the next description of John that the hail and fire is “mingled with blood”. The CME would then continue to the surface of the earth and burn-up the trees and vegetation.