Majority of US Households Now Cellphone-Only, Government Says (networkworld.com)
The National Center for Health Statistics has released a report that says, for the first time in history, U.S. households with landlines are now in the minority. Network World reports: The second 6 months of 2016 was the first time that a majority of American homes had only wireless telephones. Preliminary results from the July-December 2016 National Health Interview Survey (NHIS) indicate that 50.8% of American homes did not have a landline telephone but did have at least one wireless telephone (also known as cellular telephones, cell phones, or mobile phones) -- an increase of 2.5 percentage points since the second 6 months of 2015. Young adults (25-34) and those who rent are most likely to live wireless-only, as 70 percent of that demographic lives with a landline.
That depends on the area. In many places, cell towers have as little as 24 hours of backup power. Most COs for POTS lines have a week or more.
The actual copper is often buried where it won't be blown down by storms, unlike a tower.