Yup, anything over 95ish can cause internal damage. It would obviously need to be much hotter to cause a visual burn (ie blisters and such). Like MrLang said, it doesn't really take much over 100 for even a short period of time to cause neurological damage. I know this first hand, unfortunately. I had a cheap thermostat (hydrofarm) fail about a year or so ago in one of our QT tubs. It didn't even get that hot, high 90's, low 100's. It literally fried our poor carpet's brain. She couldn't control herself. Imagine the worst case of IBD you've ever seen. I ended up having to put her down.