Come, my people … into thy chambers. As when a storm comes, prudence counsels men to seek shelter (Exodus 9:19), so now the prophet advises his people to put themselves under cover during the coming tempest.
His meaning, probably, is that they should retire into the privacy of communion with God, withdrawing from public affairs and the distractions of a worldly life. Shut thy doors about thee. For a little moment (so in Isaiah 10:25; and again in Isaiah 54:7, Isaiah 54:8).
God's estimate of time, we must remember, is not as man's (Psalms 90:4; 2 Peter 3:8).