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- In "The Other Woman", Ben bargains for his freedom, not wanting to be locked up for Christmas. His comment to Hurley and Sawyer, when they were playing horseshoes, referred to Christmas dinner.
- The Tsunami and Indian Ocean Earthquake of December 26, 2004 will have an effect on the Island. While it hasn't yet occurred on the show, it happened in real life and will likely factor into the show, as hinted by the producers in an interview with the Chicago Tribune. 
- The Island is off the coast of Indonesia. This would help explain how Eko's Nigerian plane crashed on the Island. This would also put it in the wake of the Tsunami.
- At 7:34 in "Whatever the Case May Be" (Season One), it shows the ocean suddenly coming onto the beach and washing stuff away. Sayid remarks, "This can't be normal. The tide shifting so suddenly. Rising in so short a time." The producers have talked a few times about time moving differently; the tsunami having an effect when they have only been on the island a few weeks would indicate that time is moving faster in the "normal" world than on The Island.
- On September 22, 2004, Oceanic flight 815 crashes on the island. From that day it's 95 days until the Tsunami and Indian Ocean Earthquake occur. The episode Through the Looking Glass (ending of season 3) take place between day 90 and 91 after the crash. In that timeline the Tsunami and Indian Ocean Earthquake would not yet have occurred. If it's implemented in the show it's likely to happen sometime in season 4.
- In real life, Fiji reported an 11cm rise in sea level; Vanuatu reported an 18cm rise. If the difference is split for the theoretical location of the Island, then 15cm equals 15 meters of horizontal shoreline retreat. That's almost 50 feet. The beach camp would be mostly, if not completely flooded. That's substantial, even if it didn't kill anyone.
- Even two days late according to Lostpedia calendar, could the wave created by the vanished island be the start of the tsunami?
- The Tsunami will not affect the Island because it affected Indonesia no further east than the island of Sumatra, which is by no standard definition a part of the Pacific Ocean. Fiji, approximately two flying hours away from where Oceanic flight 815 crashed, is thousands of kilometres further east than Sumatra, and the whole region was largely unaffected by the Tsunami.