This is only for people who believe the Bible to be God's word.
According to the word of God, all prophets have departed from the earth, therefore no man can say what is on the mind of God, other than by what he can read in the Bible (Zachariah 13:1-6; Ephesians 4:11-15, 1 Corinthians 13:8; John 5:39, John 8:31-32).
Now it is true that God has destroyed cities in olden times and it certainly wouldn't be a problem for him to do so today (Genesis 19:24-29; Luke 1:37). But the question is, "By what means do these preachers of today know that the storm of last week was sent especially to destroy the Gulf region?" The answer is no one knows, so let us just consider it a natural disaster and don't read anything else into it because natural disasters can happen at any time. Now is a very good time for all to step up to the plate and figure out what can be done to help the people of the region and leave the announcements of doom to God.
Hope to hear from you or see you at the services.