Is Hotend with no filament during print dangerous?

I have an Ender 3 linked up to OctoPrint with a webcam. I run the printer at the office and monitor it remotely to make sure nothing major has gone wrong.
Its very stable and I never have to stop it printing for problems.

BUT, my question is- if while i'm sleeping it runs out of filament, is there a chance of burning the hotend or worse damage? What happens if it runs out and just prints air at 205C for 8 hours?

Thanks.

nothing happens.
been there - done that :-)

Even if the nozzle gets completely encased in filament it doesn't seem to do any real harm.

I suppose there is a slight chance of filament catching fire, but never seen or heard of it happening.