Passage: Canada is geologically active, having many earthquakes and potentially active volcanoes, notably Mount Meager massif, Mount Garibaldi, Mount Cayley massif, and the Mount Edziza volcanic complex. The volcanic eruption of the Tseax Cone in 1775 was among Canada's worst natural disasters, killing an estimated 2,000 Nisga'a people and destroying their village in the Nass River valley of northern British Columbia. The eruption produced a 22.5-kilometer (14.0 mi) lava flow, and, according to Nisga'a legend, blocked the flow of the Nass River.Average and high summer temperatures vary across Canada from region to region. Winters can be harsh in many parts of the country, particularly in the interior and provinces, which experience a continental climate, where average daily temperatures are −15 °F (5 °F) and −40 °F (−40 °F), while the coastal regions of northern British Columbia have a mild winter. On the coastal regions of northern Canada, snow can persist at temperatures from −15 °F (5 °F) to −40 °F
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