Natural Disasters: when a disaster has caused serious casualties or destruction and it is unclear whether sufficient resources are available nationally to meet immediate needs, when the disaster has caused international concern irrespective of the resources available, or where there are catastrophic consequences to the environment. ´
Complex Emergencies: when there is the sudden onset or change in intensity of a complex emergency, which is likely to result in a change in the humanitarian coordination structure in-country, particularly when there are inadequate resources in-situ to support the new coordination mechanism.