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In page Odesa:

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The coastal cliffs adjacent to the city are home to frequent landslides, resulting in a typical change of landscape along the Black Sea. Due to the fluctuating slopes of land, city planners are responsible for monitoring the stability of such areas, and for preserving potentially threatened building and other structures of the city above sea level near water.[2] Also a potential danger to the infrastructure and architecture of the city is the presence of multiple openings underground. These cavities can cause buildings to collapse, resulting in a loss of money and business.[citation needed] Due to the effects of climate and weather on sedimentary rocks beneath the city, the result is instability under some buildings' foundations.