Isaiah 8:7b & 8
"It will overflow all its channels, run over all its banks and sweep into Judah, swirling over it, passing through it and reaching up to the neck. Its outspread wings will cover the breadth of your land, O Immanuel!" NIV translation
God uses the picture of a mighty river during a massive flood to tell of the coming disaster on the land of Judah. We see that the water reaches the neck but does not cover the head and therefore a person would not drown if they were standing up. Even though it is coming and will cover the land, we see that God is with them (that is what Immanuel means) and will preserve His people. That same promise is for us today as, no matter what is happening, God will preserve His people until His purpose is complete.