You guys, I am sooo sorry. The woman who sent them to me just emailed again that they are a hoax.

So I've been going around and apologizing.

At a truckers forum I found that they had figured it out:

Quote Originally Posted by trckndadsangel
These are not photos from Katrina. These photos were take by Mike Hollingshead who is an avid storm chaser from Nebraska. Mike took those photos in 2004. You can information about the truth about this here http://www.snopes.com/photos/natural/storm.asp You can also check out Mikes site here http://extremeinstability.com/my_profile.htm You can also get more information on another board that I often go to when chasing storms online that Mike himself goes to you can read more about how these photos are not of Katrina http://www.stormtrack.org/forum/viewtopic.php?t=8457

Just wanting to put credit where credit is due.