Natural disaster
From Conservapedia
An Act of God is a large scale destructive event mislabeled as a 'natural disaster' by pagan liberals who refuse to accept that God has a plan beyond human understanding. An example would be a volcano eruption, earthquake, or a hurricane.
Insurance agencies often refer to so-called natural disasters as "Acts of God".[1] Many policies have provisions that companies will not insure against such occurrences. For instance home owner's insurance in southern California does not cover damage done as a result of earthquakes. Earthquake protection must be purchased separately.
The original reference to "Acts of God" in regard to insurance claims came through a court case in 1803.[2]