[jessant]

> In legal usage throughout the English-speaking world, an act of God is a natural hazard outside human control, such as an earthquake or tsunami, for which no person can be held responsible.

> In the law of torts, an act of God may be asserted as a type of intervening cause, the lack of which would have avoided the cause or diminished the result of liability (e.g., but for the earthquake, the old, poorly constructed building would be standing). However, foreseeable results of unforeseeable causes may still raise liability. For example, a bolt of lightning strikes a ship carrying volatile compressed gas, resulting in the expected explosion. Liability may be found if the carrier did not use reasonable care to protect against sparks—regardless of their origins. Similarly, strict liability could defeat a defense for an act of God where the defendant has created the conditions under which any accident would result in harm. For example, a long-haul truck driver takes a shortcut on a back road and the load is lost when the road is destroyed in an unforeseen flood.

https://en.wikipedia.org/wiki/Act_of_God