Moving from the prevention pillar, what you're asking about is our moving into the response.... That's a very good question. In fact, the government has the federal emergency response plan, which is the document that guides how the government will respond to an event affecting the national interest, and Public Safety, through the Government Operations Centre, is the key hub.
All departments and agencies have their own legislative mandates, and they perform their duties according to that legislative mandate. However, from the Prime Minister down, the federal emergency response plan is structured such that key decision-makers are brought together, usually at the assistant deputy minister, deputy minister, and then cabinet levels. They are fed information, decision briefs, and factual points of what is going on in a crisis situation. Ministers have their responsibilities, according to their mandate, to undertake their activities. But overall, Public Safety, through the Government Operations Centre, is the nodule, the hub, that takes that information and provides it up to cabinet and, ultimately, the Prime Minister, if necessary.