This poem is a very good answer to the 3 am challenge! I liked how well it flowed from one line to the next. Good work!

*hugs, your friend Cat

Certainly is the devil's hour. I enjoyed your take on the challenge and the research you have done to bring factual elements to the poem. Well done.

I've never associated 3 a.m. with the hours of the devil before, [I've learned something new, thanks!]
although I suppose I've cursed the hour for being the one
to bring about closing time at our local watering holes.

Yes, being awake in those hours of pre-dawn can be scary,
especially if you have things to worry about. Bills, grief, etc...
There's nothing much to do at that time, but think about the things
that you have been putting off the whole waking day.

I think that maybe you might rethink the first line of the second stanza.
You do use the word in the first line of the third stanza, so I think you might say something like:
[The silence is so loud, that it can deafen you.] I'm sure that you can come up with a good second half-line.
As always, my advice is just that, advice.
Use it, twist it, throw it away. ~ Geez.
.