Know your flood hazard

Coastal Flooding

Two types of flooding occur in Mount Pleasant. The first type is localized flooding due to blocked or inadequate drainage facilities. The second is due to rising water caused by tropical storms and hurricanes, commonly known as the “storm surge”. This type of flooding may also have wave action which could exert velocity impact forces against structures located in coastal high hazard areas (also known as “V” or “VE” flood zones). The most recent events that have extensively flooded the low areas of Mount Pleasant include an extreme high tide on New Year’s Day 1987 and Hurricane Hugo in 1989. High water marks resulting from Hugo have been surveyed and are shown on maps in the Planning & Development Department. However, as we have learned most recently from Hurricane Katrina, past events cannot be relied upon to predict future events. Every storm is different!