The Rumbling is supposed to eliminate all life outside the walls, and we know people can't escape by climbing mountains because the Titans will walk over them. But how about basements?
Shouldn't some people be able to escape by hiding in basements? The footprints shown of the Titans don't seem to be so deep as to make someone unable to escape by hiding in a deep basement. Or are people also killed by other means when the Rumbling happens, such as high surrounding temperature or something?