because, intentionally or otherwise, your joke is 'too on the nose', as comedians put it, and 'will the oceans boil first' is, unfortunately, not an unreasonable question to ask, as during any positive feedback loop there is the chance for it to go into runaway. The second planet in our solar system likely experienced just such a cascading change, for example. Earth hasn't gone there before, or we wouldn't be talking (that so-called 'weak anthropic effect' Stephen Hawking was on about in _A Brief History of Time_,) but there is no a priori reason to think it _couldn't_, given a sufficient carbon pulse.

That said, we're more likely looking at more of a prehistoric scenario, near as I can suss, which would be more like, 'most high-metabolism creatures can't hack it, but at least you get some really cool massive dragonflies!'. This is emphatically a place we've been before, and, given all the prehistoric carbon now in every breath, a place we will likely be seeing again, and soon.

I'm very sorry about your planet and you have my condolences.