The waves managed to reach the top of a house trapping and drowning Jonas but yet Buck and Christopher find shelter on top of a fire truck at the pier that is only about 3/4 under water. However, this inconsistency assumes both are at the same height above sea level and/or the house has remained on its foundation.
In the final montage, when the captain of the 136 is in hospital post arm amputation, the green screen sleeve on his arm is visible.
An 8.9 underwater earthquake off the coast of Alaska would have triggered mandatory tsunami watches/warnings along the entire Canadian and American west coast. No way would so many people and officials be caught unawares.