Genesis 9:16

And the bow shall be in the cloud; and I will look upon it, that I may remember the everlasting covenant between God and every living creature of all flesh that is upon the earth.

1. God made it crystal clear that He would always remember His covenant with all creatures on the earth whenever He looks at a rainbow.
2. God promised to keep a continual watch on the earth's weather, noticing the rainbows. Presumably, He is still doing so today.