The following is a flood hazard map from the World Health Organization: http://www.emro.who.int/eha/pdf/tun_flood.pdf

Funny how the 2009 floods now seem like a distant memory.  Subsequent, more dramatic events like flooding in Saudi Arabia (of all places) and more catastrophic disasters like the Haiti earthquake, have completely over-shadowed floods in Tunisia... however, the pain for those affected remains real and the need for better planning and infrastructure ever more pressing to avoid similar consequences from the next event.