Editing Clark County, Washington (section)

===Climate===
Spring thaws can often swell county waterways, with two of the more destructive floods being those of the Columbia River in June 1894 and May 1948. The 1948 [[Memorial Day]] flood almost topped the Interstate Bridge's support [[pier]]s and completely destroyed nearby [[Vanport, Oregon]]. Construction of [[The Dalles Dam]] and destruction of [[Celilo Falls]] are credited with a decrease in such floods.

Significant windstorms in Clark County include the [[Columbus Day Storm of 1962|Columbus Day windstorm]] of October 12, 1962, and [[1972 Portland-Vancouver Tornado|an April 6, 1972, tornado]] which rated F3 on the [[Fujita scale]], striking a local school. A "[[Friday the 13th]]" storm in November 1981 brought winds up to {{convert|70|mph}}, with other storms including the [[inauguration day]] storm of January 20, 1993, the [[Our Lady of Guadalupe|Guadalupe Day]] storm of December 12, 1995 (with winds up to {{convert|95|mph}} at [[Washougal, Washington]]) and small tornado on [[Tornado outbreak sequence of January 7–11, 2008|January 10, 2008]], which destroyed a boathouse at Vancouver Lake and caused damage to buildings in [[Hazel Dell, Washington|Hazel Dell]] before dissolving near [[Hockinson, Washington|Hockinson]].<ref>"Region has long history of damaging windstorms," by Don Hamilton, ''The Columbian'', January 11, 2008, p. A5.</ref>