This is not the first time such a story has been told. During a previous hurricane in Houston (either Rita or Ike), it also was reported that Joel told evacuees to go to the convention center instead of coming to his church. I guess he didn't want all those dirty, sweaty people messing up his nice new building.
Joel claims to preach from the Bible, but he does not seem to preach the Gospel of Jesus. Joel's gospel is that of "prosperity" - your best life NOW - and it is indistinguishable from the teachings of deceased pastor Reverend Ike (the man who said "I love money, and money loves me").
Joel's got it all backward. Jesus would perform a miracle first, and THEN tell people about the coming Kingdom of G-d. Joel's method is to tell you about prosperity and then to send you out to perform your own miracles to achieve it.
Joel, if I were you I would not worry about the bad PR you've received of late. No, I would worry whether or not I was doing what Jesus wanted me to do. After all, did He not say this?
Then shall he say also unto them on the left hand, Depart from me, ye cursed, into everlasting fire, prepared for the devil and his angels:
For I was an hungred, and ye gave me no meat: I was thirsty, and ye gave me no drink:
I was a stranger, and ye took me not in: naked, and ye clothed me not: sick, and in prison, and ye visited me not.
Then shall they also answer him, saying, Lord, when saw we thee an hungred, or athirst, or a stranger, or naked, or sick, or in prison, and did not minister unto thee?
Then shall he answer them, saying, Verily I say unto you, Inasmuch as ye did it not to one of the least of these, ye did it not to me.
And these shall go away into everlasting punishment: but the righteous into life eternal.
Matthew 25:41-46 KJV