Investigators in California say a Calgary man and his seven-year-old daughter have died after they were swept into the Pacific Ocean by a wave that was approximately six metres tall. CBC News science and climate specialist Darius Mahdavi discusses what could have caused the wave that swept the two into the ocean. Read more: https://www.cbc.ca/9.6980908 »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS For breaking news, video, audio and in-depth coverage: https://www.cbc.ca/