By Cora Currier, ProPublica 

In a natural disaster or other emergency, one of the first things you’re likely to reach for is your cellphone. Landlines are disappearing. More than 30 percent of American households now rely exclusively on cellphones.

Despite that, cell carriers have successfully pushed back against rules on what they have to do in a disaster. The carriers instead insist that emergency standards should be voluntary, an approach the Federal Communications Commission has gone along with.