For help programming the radios without a computer.
UV-5R
For a list of repeaters...
Repeater Book
Google your local county's frequencies to find and tune to those (that radio can actually TX on all RX ranges, so you could directly contact local EMS/Sherriffs dispatch (assuming that they are not using trunked systems) if you needed to. Program GMRS channel 20 (a google search will tell you the frequencies).
Hit Menu, 1, Menu, 5, Menu, Exit. (this will allow you to acess frequencies in 5kHz steps)
When you look at the repeater book frequencies, there will be a frequency with a + - near it, the next column will have another number (PL/CTSS). This can be changed with under section 25 of the menu to + - or off. Offset is section 26 (enter 00.500 for 2M freqs, 6.000 for 70cm freqs). I'll let you read up on programming. Remember, you have to be on the A frequency and you need to make sure that the channel you are saving the frequency to is clear (ie, if another freq has been stored on that channel you have to delete the channel before you can store a new frequency).
After the hurricane, do yourself a favor and take the tech exam.