11.   That makes the ice sheet on top more vulnerable to warming waters lapping at its edges.

12.   The solution could involve sending divers underwater to weld a narrower pipe opening to the end of a pipe that returns warmed water to the lake.

13.   To maintain their strength, hurricanes need warm ocean water beneath them and relatively light winds above them.

14.   The fish need warm water for survival, and the power outage left their new home without heat.