The Salvation Army is always a good choice for charitable donations with the knowledge that your money is spent wisely, and on what you meant it to be spent for. I only donate (in addition to my regular contributions to my Church) to one other charity: Southern Baptist Disaster Relief.
Baptists responding to historic tornado outbreak
Southern Baptist Disaster Relief is known more for establishing feeding stations for victims, first responders, and relief workers than for anything else, but according to this article from their website, they are being used for search and rescue efforts, which is a first, according to the article. My Church regularly sends money to SBDR, earmarked for specific areas, and I'm sure we will do it this time. I recall that after Katrina hit NO, the head of SBDR said that the Red Cross had asked for SBDR and The Salvation Army to plan on providing 30,000 hot meals per day for an indefinite period in NO and a couple of places in Mississippi.
State Baptist Disaster Relief units provide food as well as helping with clean-up work with chain saws and sometimes heavy equipment, all provided by volunteers. I am retired now, and have the time to take part in such efforts, but I'm too old and fat with too many trips to the orthopedic surgeon's table to be anything but a liability in that capacity.

I can, however, donate a little financially.
Georgia Baptist Convention - Response Site Update