[aapl88889]

The original question asked which coastlines are burying houses underwater.

"The climate is clearly changing and it is really causing massive disruptions and costing trillions of dollars"

...to which coastlines? Los Angeles? Hawaii? Miami? Thailand? Barcelona? Marseille? Which?

[undersuit]

The Pacific Islands. I already said it up-thread.

https://www.elr.info/sites/default/files/article/2020/06/50....

https://www.cnn.com/2021/07/08/us/pacific-islands-climate-ch...

https://www.frontiersin.org/articles/10.3389/fmars.2019.0028...

https://www.nbcnews.com/mach/science/three-islands-disappear...

[revelio]

Your last link is about Tebunginako. That island was already identified in 1991 as suffering from ordinary coastal erosion and sandbank migration:

https://spccfpstore1.blob.core.windows.net/digitallibrary-do...

Although there is erosion near Tebunginako village centre, there is an accreting area north of the village centre where trees are systematically being planted to reclaim the accreted area. This situation implies the natural northward migration of a sand bulge along the beach

The article presents this as a narrative about climate change because that creates clicks, but it's misinformation. The fact that most of the Tuvalu islands have grown over the past 40 years shows that climate change is not sinking the Pacific Islands, even if some very small ones do disappear or move due to natural forces.

From a quick look, your other links aren't more reliable unfortunately. These sorts of islands are prone to erosion and movement of the coastline, which would occur regardless of whether humanity was here or not.

[undersuit]

But it's our actions that are causing the erosion. Our anthropogenic climate change has caused these coastlines to change. People are being affected by our actions. Over just 200 years instead of 10s of thousands.

[revelio]

Please prove that it's human actions that cause coastal erosion, because I'm pretty sure coastlines have always been moving and shifting in response to erosion. That's how beaches are made, isn't it?

Also, even if that were to be true which I doubt, so what? They were supposed to sink beneath the waters as they rapidly rise due to melting polar ice. That was the doom scenario that was used to motivate people, but it hasn't happened. In a rational world that should cause us to toss out the other predictions made by such "experts", not try to retcon what was said to fit whatever actually happens. Especially because a change like "maybe a beach migrates northward a bit in some islands, others grow a bit, others shrink a bit" is nowhere near important enough to make disruptive changes to the lives of everyone on the planet.