The intensification of marine heatwaves poses severe risks to marine ecosystems and coastal communities. Coral reefs are being bleached, kelp forests are disappearing, and fishing grounds are being depleted, threatening biodiversity and livelihoods. The ocean's chemistry is also being disrupted, with increased acidity and reduced oxygen levels. These changes can exacerbate extreme weather events on land, such as storms and flooding. Sea levels have risen by 23 cm since 1901, accelerating the risk of coastal flooding and storm surges. The IGCC report warns that these impacts are likely to worsen if the Earth's energy imbalance continues to grow.