When is the emergency support function activated before or after the incident occurred?

Emergency Support Functions (ESFs) are typically activated before, during, or after an incident, depending on the nature of the emergency and the preparedness measures in place. They are often pre-activated during disaster planning and response exercises, allowing for quicker mobilization of resources. However, in real-time situations, ESFs may also be activated immediately after an incident occurs to provide the necessary support and coordination for effective response efforts.