KM4ACK is a native of Tennessee and gives a nice overview of what the annual ARRL Simulated Emergency Test (S.E.T.) is all about in this video (8:57 min)
LINK:
His QRZ bio includes this:
My hometown experience a tornado outbreak on Good Friday 2009.
We lost cell service and power for several days.
Because of that experience, my primary focus is on emergency comms.
Most everything I do is slanted that direction.