In the majority of major disaster emergency situations, such as earthquakes, cyclones and hurricanes, terrestrial-based infrastructure is either destroyed by the disaster or was not available before the disaster occurred.
3. Dans la plupart des situations d &apos; urgence en cas de catastrophe de grande ampleur, comme les séismes, les cyclones et les ouragans, la catastrophe a détruit les infrastructures terrestres ou celles-ci n &apos; existaient pas auparavant.