Did you hear from that team lately in regards of how they're doing? Do they still put in 60+ hours a week or did they switch to a more balanced work life?
A lack of planning on your part does not constitute an emergency on mine.
Work steady hours, and the "output" becomes predictable (this is what agile methodologies are also about - predictability), which allows for better planning. Working 60+ hours means the output becomes very unpredictable. I mean people will crack and either leave or become overworked at that point, and now there's an even bigger problem.