Pacific Island Countries and Territories (PICTs) are among the most vulnerable regions to climate change due to their small land area, low elevation, high population density, and fragile economies and ecosystems. However, the extent to which climate change will alter the frequency and intensity of extreme events in these territories remains uncertain. This uncertainty arises primarily from the coarse spatial resolution of current-generation general circulation models (GCMs), which are unable to adequately capture the fine-scale morphological and geographical features of the islands. To address this critical knowledge gap, this thesis analyses for the first time kilometer-scale climate simulations from the Destination Earth (DE) Project using the ICON climate model.