An emergency is defined in the Emergency Management and Civil Protection Act as: "a situation or an impending situation that constitutes a danger of major proportions that could result in serious harm to persons or substantial damage to property and that is caused by the forces of nature, a disease or other health risk, an accident, or an act whether intentional or otherwise."
Depending on the nature or magnitude of the situation, a coordinated response by a number of agencies may be required. These emergencies are distinct from the normal, day-to-day operations carried out by the first response agencies, such as police, fire, or ambulance. These emergencies would likely:
- Be widespread and catastrophic.
- Require a coordinated, multi-agency response and commitment of local and external (i.e., Provincial) resources.
- Require a substantial expenditure of funds or borrowing of specialized equipment and resources for the response and recovery.
If a situation meets any of the above criteria, the Emergency Management and Civil Protection Act gives the Head of Council of any municipality (i.e., Mayor) in Ontario the authority to declare an emergency.