"Text messaging will work?"
My friend in Luling, LA (30 miles from downtown NO) could send and receive text messages after Katrina but phone calls were a no go. It was very helpful.
Here is the only communications tool that will work. I bought one and am getting licensed.
# 900 Memories
# AM/FM BCB
# AM band and full SW to 30 MHz
# CTCSS/DCS
# European Tone Burst
# Wideband Receive
# True Dual Receive
# ARTS-Automatic In-Range Transponder
It is also fully submersible.
http://www.universal-radio.com/catalog/ht/0777.html