Why is the dome the best solution?
Think about the original designers of the dome - why have it? An answer to this question may answer your question.
The only reason to have a dome is to be on the surface of a planet, otherwise you might as well be underground in a large protected cavern. But why risk being on the surface of a planet? The only real reason is for light.
Caverns supply much more protection against radiation, weather, atmospheric pressure differences. They are also much more readily occupiable, with little investment compared to domes. They are also more safe - domes can fail and be damaged easily, resulting in likely catastrophic failure. In fact, failure should be considered to be inevitable requiring constant maintenance.
Only in certain situations, such as high seismic areas, are domes preferable, but even then it begs the question as to still why it is there. If you need it for light to grow, for instance, crops - this can be accomplished hydroponically using artificial power sources more readily, with more reliance and efficiency.
Perhaps the original designers of your dome like the psychological benefits of being able to see out, but if we are talking of a hostile environment I'm not sure if this is too beneficial for the risks. Your dome would need to withstand corrosion, heat, wind forces, radiation, dust, pressure, micrometeorites and unintentional or intentional damage - all the while being transparent and clean (otherwise no point...).
It would need constant injection of power to either retain heat or lose it though the dome, whilst dealing with direct solar radiation. It would need constant maintenance and investment, for which any error could prove fatal to all who reside in it. Best choose safety and go underground if possible.