Sounds like this has more to do with impacts these temps have on biological life in those regions, and how that impacts those animals interactions with humans? I was curious if it meant earthquakes or volcanoes or something, but likely not? This is not my area of expertise, from the article:

> Warm ocean temperature extremes—known as marine heatwaves (MHW)—can dramatically impact the overall health of marine ecosystems around the globe, including changing the regional distribution of marine species, altering primary productivity, and increasing the risk of negative human-wildlife interactions1,2,3,4,5,6. As a result, there has been a considerable effort to characterize the timing, intensity, duration, and physical drivers of both individual and composite MHW events2,7,8,9,10,11,12,13,14,15,16.

Edit: I’m going to leave it but, boy, those superscripted linked sources really failed to copy over usefully.