Is it any coincidence that this is the 9-1-1 verse? In whatever troubles we face today, God is the place of refuge we can run to, He is our safe place.
The word “dwell” used in this verse actually means, “to take up permanent residence in.” He reminds us to stay in His presence, for it’s a permanent place of living. His Word says if we do that, we will “rest” in the very "shadow of the Almighty."
Meaning of Psalm 91: Shadows by definition are a place of protection or covering, they provide relief from the direct heat of the sun. If the heat is severe, the shade is the place we run to. It diminishes what we actually feel in the intensity of the heat.