Here is a Cultural Literacy worksheet on the tsunami as, you know, a seismic event. This is a half-page worksheet with a reading of three relatively simple sentences and three comprehension questions. Just the basics, but with a good explanation of the fact that tsunamis are also called tidal waves.
If you find typos in this document, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.