Whereas the small town of Mattawa just over on the Eastern side of the Cascades receives only four and a half inches of rain per year which is about the same as infamously dry Las Vegas.

然而，位于喀斯喀特山脉东侧的小镇马塔瓦每年的降雨量只有 4.5 英寸，这与有名的干燥城市拉斯维加斯差不多。