Since 2005 Coro has been officially listed as an "endangered" World Heritage Site (see List of World Heritage in Danger). Climate change in Venezuela, in particular heavy rains, have caused significant damage to its rich architecture. Coro's traditional buildings were built with techniques based on the use of earth (adobe, and earth reinforced with a plant structure in a technique called "bahareque"). Many of these buildings are vulnerable to heavy rains, as in its natural state earth is a material of low resistance to moisture.