All organisations must have appropriate emergency response plans in place for coping during any unforeseen crisis or disaster that threatens to interrupt their normal operation. This includes emergencies caused by power cuts and fires, by adverse weather events, such as heatwaves, floods and extreme winter conditions, and those caused by serious security alerts, such as terrorism and bomb threats. Plans should be supported by effective business continuity management arrangements which cover how they will maintain essential services during the crisis and how they will recover the business and return to normal as quickly as possible afterwards.