Are you willing to pay increased taxes, so that FEMA (Or your countrys similar) can afford to run 100.000 servers, in order to "do TLS on Google scale", so that they can get emergency orders out for civil defence ?
Have your forgotten (or maybe never seen ?) CNN's traffic graph from 9/11 ?
Experience so far is that emergency services web-pages tend to die the instant they are most needed. Addint TLS will just make that happen even more.