Natural evil is evil for which "no non-divine agent can be held morally responsible for its occurrence" and is chiefly derived from the operation of the laws of nature. Others such as Christian theologians reject this definition and argue that natural evil is the indirect result of original sin just as moral evils are, although moral evil is "caused by human activity" directly. Some theologians even argue that natural evil is directly perpetrated by demonic agents. Atheists argue that the existence of natural evil challenges belief in the existence, omnibenevolence, or omnipotence of God or any deity. Nature of natural evil Moral evil results from a perpetrator, usually a person that engages in vice, either through intention or negligence. Natural evil has only victims, and is generally taken to be the result of natural processes. The "evil" thus identified is evil only from the perspective of those affected and who perceive it as an affliction. Examples include cancer, birth defects, tornadoes, earthquakes, tsunamis, hurricanes, and other phenomena which inflict suffering with apparently no accompanying mitigating good. Such phenomena inflict "evil" on victims with no perpetrator to blame. In the Bible, God is portrayed as both the ultimate creator and perpetrator, since the “sun, moon and stars, celestial activity, clouds, dew, frost, hail, lightning, rain, snow, thunder, and wind are all subject to God's command.” Examples of natural evils ascribed to God follow: Floods: God brought “a flood of waters on the earth” (Genesis 6:17). Thunder, hail, lightning: God “sent thunder and hail, and fire came down” (Exodus 9:23). Destructive Wind: God sent a “great wind” that destroyed Job’s house and killed his family (Job 1:19). Earthquake: By the Lord “the earth will be shaken” (Isaiah 13:13). Drought and Famine: God will shut off rains, so neither land nor trees yield produce (Leviticus 26:19–20). Forest fires: God says, “Say to the southern forest, 'I will kindle a fire in you, and it shall devour every green tree in you and every dry tree'” (Ezekiel 20:47). However, some theologians emphasise that, whilst God is the ultimate perpetrator, natural evil is, in actuality, directly perpetrated by Satan and his demons. This is exemplified in how Satan is portrayed as the direct perpetrator of Job's suffering in the Book of Job. Traditional theism (e.g. Thomas Aquinas) distinguishes between God's will and God's permission, claiming that while God permits evil, he does not will it.