Tucked into a valley and bisected by a river, Tegucigalpa is prone to flooding during the rainy season, as experienced to the fullest during Hurricane Mitch and to a lesser degree every year during the rainy season.  Despite being several thousand feet above sea level, the city lacks an efficient flood control system, including canals and sewerage powerful enough to channel rainwater back into the river to flow down to the ocean.  The river itself is a threat since it isn't deep enough below the streets, nor are there levees high enough to prevent it from breaking out.  There are more than 100 neighborhoods deemed ''zones of high risk'', several of them ruled out as uninhabitable in their entirety.