Your employer has to follow the standard consultation and redundancy process, unless there is a clause in your employment agreement that says they can permanently stop your employment in cases of natural disaster or unexpected and unavoidable event.
This is usually called a “force majeure” or “act of god” clause and is specific to situations where your job will no longer exist because of the event. Your employer can only use this clause when the business will be permanently shut, not just to cover a break or short term closure.
If your employment agreement has a a force majeure or Act of God clause, your employer still needs to consult with you about this.