IPhone just came up with Temperature is to high cool down?

I was outside and my phone was in the sun and I picked it up and it was boiling.I've cooled down and now it's fine, do you think the battery and externals are kk? Also can't go to apple store as it 74 miles away

Just make sure you don't put it in the sun like that. It might damage the internals.

Yes it should be fine, but of course don't make that a habit.

Yes, they are all ok and you need to take care of it as it might damage your device and I would suggest you should install app Leo Privacy Guard.