Apex domains cannot have CNAME records.
Question and response
Question
dig thedisasterresponsesite.com. NS
Answer
thedisasterresponsesite.com. 5 NS ns-1129.awsdns-13.org.
thedisasterresponsesite.com. 5 NS ns-1869.awsdns-41.co.uk.
thedisasterresponsesite.com. 5 NS ns-1939.awsdns-50.co.uk.
thedisasterresponsesite.com. 5 NS ns-521.awsdns-01.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0