In any case of the natural risks or human risks, populations, ecosystems, flora and fauna are exposed to threats. The objective is to study the impact of intervening disasters in Bukavu city from 17 to January 26 2014. We preceded the interview of people met instead of the disaster victim. We have visit the damaged sites also (districts), through a transect walk as definite by Dery and al., (1999). The identification of the different disasters was done by free observation. The disasters occurred in Bukavu are varied (crumbling, landslide, tornado). The consequences on the buildings are considerable (wall collapsed to Camp Zaire, house slipped to Muhungu, house swallowed in the mud at College Alfajiri basin. The reasons of the disasters are the anarchical constructions in Bukavu city. The human damages recorder from 19 to 28 January 2014 is 21 deaths. For one housemaids management and prevention of the natural disasters in Bukavu city, the provincial government should push and improve the legal setting of assignment of the permits to build and fundamental titles taking into account the seismic norm.