In domestic Chinese teaching, 冫, 氵, and 灬 are called “两点水”, “三点水”, “四点水 or 四点底” respectively. It sounds they are all related to water 水, but they are not actually all in the family of water.
Radical 冫
The radical ” 冫” denotes “ice”, so characters composed of the characters composed of ” 冫” relate to ” cool, cold, low temperature, etc”, for examples, 冰、冷、冻、冰、凉、凝、凌、凄、etc. Check out more characters formed by 冫.
Radical 氵
The radical ” 氵” denotes “water”, so characters composed of ” 氵” relate to “river, sea, rain, etc” such as 海、江、法、波、淋、洒、滩、渴、溪、温、消、渐、河、淡、池、洗、湖、沐, etc. Check out the component 氵 for more characters formed by it.
Radical 灬
The radical ” 灬” denotes “fire”, so most of the words with ” 灬” relate to ” fire, hot, high temperature, etc”, for examples, 
煮、熟、热、熏、烈、煎、焦、熊、烹、熬、点、照、etc. See the component 灬