lecol4,
Wow, yes, 100F is a danger zone for sure even at a peak.
I've done many tests with Dubias with concern to temperature. One that really wasn't a test, but may surprise many, so I will explain in a bit more detail.
We live in Northern Arizona about 7,000 feet up, so yes, it does snow in Arizona
A couple of years ago we had a package of 2,000 mediums that were returned to us "Undeliverable as Addressed", now even though we had all the proper marking on the outside of the box and heat packs inside the box, the mail lady still left the package outside our home, next to the front door, but in the snow.
The package had been out of our hands for nine (9) days and we were not home for an additional two (2) days. The 2,000 dubias had been in this box for 11 total days.
When we opened the box we expected to find everyone dead, but, other than moving really slow everyone was alive, not a single dead roach in the bunch.
Now, I didn't do this test on my own, but I still call it a temperature test because it really was one
As far as the normal temp we keep our little guys at, around 82F, we have found that this and good humidity of about 20-40% is perfect.
Glad to here your colony is back to cozy