Can toddler overheat at night?

C

This might be a dumb question, but I’m wondering if my daughter can overheat at night without waking up/letting me know she’s uncomfortable? Our central A/C broke today and the handyman came by, identified what was wrong and will be there to fix it tomorrow morning with the right part. My daughter is a little over two and is sleeping right now in a diaper without covers in her room, the inside temperature is around 90 because the A/C was down all afternoon. I turned on her fan full power and opened the window, outside temp is more or less the same but I’m hoping it cools down a little bit overnight (forecast says low of 79). Can she overheat without realizing and/or letting me know? I know I’m gonna have a hard time sleeping with the heat, but mainly worrying about her. Should I rather wake her up and go to my SIL‘s house overnight?