<prompt> Pedzisa mutsara unotevera: Nzira dzokupinda nadzo mumugwagwa dzave dzichivandudzwa zvishoma nezvishoma, uye munguva pfupi yapfuura nzvimbo dzinodzivirira madutu emvura dzakawedzerwa kurutivi rwokumaodzanyemba. Mugero weMont Blanc  <response>: njodzi ya1999 yakakurudzira kunzvera kukuru kwekuchengetedzwa kwemigwagwa yemigwagwa munyika dzinoverengeka kusanganisira Switzerland, uye kuvandudzwa kukuru kwekuchengeteka kunorongwa kuGreat St Bernard Tunnel. Muganhu wokumhanya makiromita 80 paawa 50 mph watova kushanda mukati memugwagwa. 