this should be the responsibility of professionals in the army, not of volunteers in the community.
trudeau's example is consequently wrongheaded, regardless of the sincerity of his intent - it's the wrong thing for him to do, in the position of authority that he's in; what he's trying to present as a responsible gesture is in truth an irresponsible abdication of his own responsibilities, and he's no doubt completely clueless about it. but, it's wrong-headed in exactly the way that neo-liberalism always is - it cuts out the functions of government, it discards the reasons we need some approximation for the state, while leaving the systems of dominance and control and tyranny and corruption in place.
if he wants to lead by example, he should restore funding to disaster management in order to kickstart a rebuilding of our collapsing civilization, not help carry forward the disastrous legacy of neo-liberalism to the next generation.
https://toronto.citynews.ca/2019/04/27/flood-weary-communities-in-ontario-quebec-brace-for-more-rain/