Jean Lafitte National Historical Park and Preserve

Flash flooding is the clearest physical danger at Jean Lafitte, with 14 recorded flash flood events in the county — more than four times the frequency of any other hazard in the data. The park's low-lying bayou terrain gives water nowhere to drain quickly, meaning trails and access roads can become impassable within minutes of a heavy storm. Jefferson Parish's violent crime rate of 587.5 per 100,000 residents also warrants attention when choosing where to park or camp after dark.

Before heading out on any trail, download an offline weather radar app and check it every hour — afternoon storms here build fast and trigger flooding with little warning. Wear water shoes or rubber boots rather than hiking boots, since wet crossings are common even on dry days. For evening camp security, choose well-lit, populated sites and keep valuables locked in your vehicle rather than visible in an open RV bay or tent vestibule.