This is off-topic for a game forum, but internationally everyone should learn these important search skills, to find disaster preparedness plans for your local nation, province, county, or city. Spread the word and teach everyone you know, and maybe save lives.
@Smulm , hope you stay safe and planned ahead. You may already know a lot but some other people may not know. This can be Too Much Information, but sometimes there is just one more helpful idea that has not been thought of.
For your specific situation of Hurricane Irma attacking Florida, I have found these web sites for you.
National and county level
Florida state home page does not immediately show anything right away, so need to search around or click around.
Usually somewhere within the state web site, you can search and find a list of counties and cities. Wikipedia will often have your local county and city web sites.
Usually somewhere within the county web site, you can search and find a list of cities. Wikipedia will often have your local city web sites.
Other sources of information
There can be others, so you have to search around to become prepared before a disaster strikes.