Sadly, there's very little that most of us can do. But I recommend that rather than do nothing, you can make a donation to the American Red Cross as I did. (Please be patient; the link may take some time to load because they are very busy). They are on the ground directly helping victims and are best able to bring their resources to bear on the problem.
Other suggestions are most welcome.
https://www.battersbox.ca/article.php?story=20050901113045702