I was wondering if there are rules for handling hostile environments and extreme weather?

Is there anything official? Or is this one for the house rules?

There are some rules for extreme cold in Dead Stars I believe. But other than that I think we´re on our own.

There are rules for vacuum I think (unless that is in RT or DW). Would you like some suggestions for houserules? I've made some quite entertaining ones up.

I was hoping there was something official on hot/cold environments, thirst/starvation, radiation and the like.

That said, I am up for house rules. I'll post the question there.

I think it's simply a case of the GM using the Survival skill (can't remember if it's basic but i'd say let players roll half Toughness anyway if it's not) and deciding how many steps removed from the 'norm' the condition is. I mean, for humans i would say that between 5 and 25 degrees is survivable temperature, but for every 5 degrees outside this range impose a -10 to the survival test. Information on dehydration and hunger can be found all over the internet, but again, for every day without one of the above impose a -10 penalty again.

For every failure i'd impose a point of fatigue, with more points on things like dehydration or if the tests are failed by lots of degrees of failure.