Japan's coldest region, Hokkaido, has relatively cool summers and icy/snowy winters. The weather deteriorates frequently with strong icy winds lashing much of DBO. Behind her, a vast landscape recedes to icy mountains. Umbriel may be differentiated into a rocky core surrounded by an icy mantle. Oberon may be differentiated into a rocky core surrounded by an icy mantle. Titania may be differentiated into a rocky core surrounded by an icy mantle. Europa is thought to have a liquid water ocean underneath its icy exterior. Airboats are particularly effective at water rescues in shallow, marshy, or icy winter environments. They are thought to have formed from eruption of icy lava. Swimming is an option, though few are willing to swim in Lake Superior's icy waters. The relatively sharp carbide edges enhance steering on harder icy surfaces. These light plains are thought to be icy impact deposits. Tsukioka spots Godzilla swimming to the shore of a small, icy island. It is done by standing or sitting in a bucket or bath of icy water. Chester captured Lenny Skutnik's memorable plunge to pull Priscilla Tirado from the icy water.