Various natural disasters caused by the contractor is not able to protect or a watch unless force majeure which employers and contractors will be agreed or negotiate with reasons for indemnification that happened.
accidents Naturally occurring Contractors can not be prevented or precautions have to be force majeure, which the employer and the contractor agreed or negotiated reason for indemnity relies happen.
Accident, happen naturally. Unable to prevent contractors or warning until a force majeure which buyer & contractors will be agreed or negotiate with the reasons for the indemnity that happened.