In the Pacific North West..... Here's why: The Heppner Flash Flood - In 1903, heavy rains over the Willow Creek watershed sent runoff downstream, killing 247. The tributary to the Columbia River is now dammed upstream of Heppner, Oregon forming Willow Creek Lake. The Wellington Avalanche - In 1910, heavy winter snowfall kept crews from clearing tracks through the Cascades and two passenger trains destined for Puget Sound became stranded, Feb.23rd. Crews were unable to reach the trains and on Feb. 28th, a rain producing warm front triggered an avalanche which derailing the two trains. The Vanport Flood - In 1948, a section of levee on the Columbia River failed flooding housing on the then North edge of Portland, Oregon killing 85. The Columbus Day Storm - October 1962, the tail end of Typhoon Freda whipped through the PNW bringing winds of 50 to 150 MPH destroying homes and snapping trees as if they were twigs. I watched from our Beaverton home as the roof of neighboring homes sailed through the air, exploding as they impacted other homes in the development my parents lived in. The rains cause flooding and extensive damage to low lying areas. The winds were even more intense along the coast where the town of Newport recorded winds of 138 MPH. People lost power for weeks. 38 people died. Mount Saint Helens - Erupted May 18, 1980 killing 57 people. Imagine if this happened to Mount Hood or Mount Rainer?