Xavier Remington
In most cases demons don’t instantly possess someone. In addition possessions can vary based on the will power, and mental state of the human in question along with the paranormal power of the demon. Most possessions are incremental in nature as the demon brakes down the barriers of the mind, and to some extent is granted permission to enter at a sub-conscious level. Early signs of demonic possession include erratic behavior, sudden angry outbursts, nonsensical gibberish,...
The 2010's
Yes in fact Paranormal Archaeologists have found vampires frozen in Arctic, and Antarctic glaciers. These vampires may have been caught in a particularly violent widespread storm, or fell into a rapidly freezing body of water. When Cryptozoologists thawed out the subjects in the lab they sprung back to life. Experiments on other vampires placed willing subjects in cryo-chambers. They were immersed in−346 °F liquid nitrogen, and frozen for one week before being thawed out. They awoke from their cool...
As long as the oven isn’t shooting flames of fire about then they can indeed survive. However they can survive flames for a certain amount of time so as long as they’re not Holy Flames. Heat alone will not affect vampires to a certain point. Cryptozoologists have run experiments on evil vampires captured in the midst of committing unspeakable acts. In one heat experiment the vampire remained calm while lying in the laboratory oven since he was...