This week is expected to bring a string of days with triple-digit temperatures, which seem to be getting more common. KGW Chief Meteorologist Matt Zaffino explains some of the science behind these high temperatures in the Pacific Northwest and what recent trends can tell us. Watch more The Story videos: http://bit.ly/watchTheStory Follow The Story on Twitter: https://twitter.com/TheStoryKGW Follow The Story on Instagram: https://instagram.com/thestorykgw