Michael
C S Lewis had some interesting things to say on the origins, and descent into vagueness, of the word “nature”, which I summarised in the second part of this post..
On the “location” of God, the Bible itself has some subtle thoughts. When Solomon dedicates the Temple, the glory of God descends upon it visibly. yet Solomon’s commissioning prayer is careful to say that he has built a place for God’s “Name” to dwell, for you can’t build a house for God, as even the highest heavens can’t contain him.
The implication was that, though heaven was conceived as God’s dwelling place even more than the temple (with its strict holiness regulations) was, he was always known to be infinite and unmeasurable. It’s not so much that he is outside the universe, but that “place” has no meaning for God - a characteristic only shared, apparently, by quantum particles.
There is therefore no reason why God should not act within nature - nor even why “nature” might not be a description of what God does regularly. But making something happen doesn’t make you a part of it, or we’d all be part of the Internet.