Temperature Warning Hasn't let me back in my phone in 18 hours

Dear Apple Community, I'm in need of your expertise and advice regarding a concerning issue with my iPhone. My device has been displaying a temperature warning for the past 18 hours, causing it to remain unresponsive and refusing to turn on. To add to the complexity, I recently discovered that the back of my iPhone is cracked. I'm uncertain whether the cracked back could be related to the temperature warning and the device's failure to power on. Has anyone experienced a similar situation or have any insights on how these two issues might be connected? Any suggestions or recommendations on how to address this problem would be immensely appreciated. Thank you for your support!