I am still in the simulation phase so I can only report early analysis, but on an average temperate planet, the dimming of the sun, while a certain drastic change, won’t extinguish life in a few weeks, and on some planets like Vale VI it can even be months before the first real changes are visible).
Please don’t misinterpret my words.
I’m not saying that we don’t have to worry, that no consequences will be met or anything from the sort.
Just that, “astrophysically” speaking, as the current data show it, no immediate threat is to expect from the dimming of the suns, the social consequences of such event will probably cause much more destruction and deaths than the event in itself.