Why would anyone wake up to an email at 3AM?
When that happens regularly, and you get used to being woken up in the middle of the night to respond to a technical outage or needy management, the lightest phone buzz can shock you awake.
Given the described situation, I'm not surprised they woke up to an unexpected phone notification :(
To clarify, we woke up at our normal time and saw the email.
When we woke up at (roughly at 6:30), she saw a work email on her phone announcing the layoffs.