During the last ice age about 12,000 years ago the ocean was 400 feet lower than now

Often humans think things have always sort of been like they are now. However, this winter I watched boulders 50 pounds thrown up out of the ocean and across paved roads often undermining them from the water as it returned to the ocean. I watched ice plant ripped up 10 to 20 feet back further onto the land than I had ever seen. I still see when I walk along the coast and beach logs as big as telephone poles and much thicker that smashed wooden board walks and places where people walk on redwood boards along the ocean. I noticed a parking lot I sometimes park in along the beach undermined by water with a new 4 foot deep canyon cut towards the ocean through the deep sand.

All you have to do is to look at a chart of the oceans of the world to understand how different the ecology of earth would have been with a 400 foot drop in sea level at that time.

Often we think that everything has pretty much been the way we knew but NO that's not the case. Seeing how high waters can come now along the California coast shocked and changed that perception forever in  me. Driving from Kihei to Lahaina along the Coast in Maui also drastically changed how I see sea levels on earth too where ocean waves were coming up over the paved road I was driving on too in a rental car as recently as 2019 and is much worse now to the point where they had to build a road up higher on Maui and away from the coast along that route. Even though there aren't many or sometimes any houses along that stretch of road usually because of storms etc. I think it's important to understand how much higher sea level is and what changes are happening all over the globe especially during storms. Why?

Because all the major oceans are connected by water from the Pacific to the Atlantic to the Mediterranean Ocean to them all.

When water levels in the ocean go up or down (like they are drastically going up now year by year) this inundates all coastal communities worldwide. For example, Miami often at the coast is now 6 feet underwater at high tide so you cannot drive through some areas except at low tide or lower tide and never during a storm. You can also look at Venice or other cities around the globe or Bangladesh which is mostly under 10 feet in altitude which is washing away more and more each year with the storms or countless other places washing away during high tides and storms worldwide. 

This last Fall I stayed in Kaanapali, Maui at a beach resort part of the time we were in Hawaii in October of 2022 where people who owned hotels were worried that the ocean was eating away at their lawns and could in storms flood the bottom floors of the hotels and restaurants there.

So, yes, the ocean is coming further and further onto the shores everywhere on earth from glaciers and ice bergs melting worldwide especially from Antarctica at this time.