For anyone studying hurricanes this season, here is a very useful website that includes tracking maps you can print out and use.
Depending on which direction you go, the study of hurricanes can cover many subject areas in your portfolios. It doesn't have to be through a purchased unit study either. The internet and your local library are great resources to find the following information.
Geography - Tracking maps: find out in what parts of the world hurricanes form
History - Study the impact of some major hurricanes from the past and how areas recovered
Safety Ed - What people should do in the event a hurricane is headed their way; What the flags for tropical storms and hurricanes look like.
Civics - Study ways people volunteer in a hurricane aftermath. Perhaps find one volunteer or a group of volunteers and find out what they do in a day.
Reading - Check the daily paper for stories on the current hurricanes.
Don't feel like you have the time to do the research? Go to the library, find books on hurricanes and bring them home. Give your child a blank notebook with the above questions and let him go to it. You might need to set a time limit - tell him this needs to be done by the end of the week. You might be surprised at what he will produce.
I'm sure there are more subjects to be covered, please post them in my comments because I would love to hear your ideas.
NOTE: All of the above subjects were chosen based on Pennsylvania homeschool law.