A phone shouldn't get hot enough to crack it, that is an indication of a problem. That doesn't mean a phone won't get hot enough to crack a screen.
My Note 3 started heating up badly, it would spike up to 135 degrees. When I called Samsung, they wanted me to send it in immediately. When it got there, it did have a camera lens crack, which was covered by warranty. That wasn't the screen, but the phone didn't get super hot. When I talked to Samsung, they told me if it continued getting hotter and hotter, at best I would end up with a cracked screen, at worst a burned up phone.
My phone had a motherboard that went bad and was causing it to heat up. It just hadn't gotten hot enough to crack my screen. So yes it could happen, should it happen? No, that is an indication of a problem with the glass or an internal issue causing the phone to truly overheat not just running a little hot.