I have a silicone phone protector but I forgot to remove it from the home radiator when the electricity tripped off all night?

While I was sleeping the landlord has fixed it and my phone has been warming for about 2 hrs now since the electric was sorted. I forgot to remove it from the radiator, Will my phone be ok?

I have Hauwei P30 Pro. Its not that I'm stupid or anything, I was using it as a torch because I don't sleep in the dark if I don't feel like but lamp is not working cos of no electricity and I forgot to remove it from the home radiator because I don't usually use it, I use my small halogen heater.