An additional concern for this storm, if it takes a track similar to 1926 Miami or 1928 Okeechobee hurricanes, is the Herbert Hoover Dike on the southern end of Lake Okeechobee. The dike has been known to be in a state of disrepair for quite some time; only recently has Gov. Scott pushed for funding to repair the dike. The motivation for the funding revolves primarily around preventing more discharges of algae-contaminated water into the intracoastal waterways (which has an impact on tourism). The project, so far, is badly underfunded: http://www.sun-sentinel.com/local/palm-beach/fl-pn-lake-okeechobee-money-legislature-20170614-story.html
I worry about the possibility of another flooding disaster, like what happened in 1928 and to a lesser extent in 1926. Irma, with its large wind field and possible landfalling category 4+ strength, is reminiscent of both of these storms. If the track is right, there is the potential for a catastrophic storm surge to be generated on Lake Okeechobee. Folks living in inland places along the lake, like Belle Glade and Clewiston, should pay close attention.