Warm environments in dreams is about love, connection, happiness, & support.

Cold environments in dreams is the opposite. It means being surrounded by people who are unkind, selfish, unsupportive, disconnected.

Ice is the extreme of this kind of cold environment and can indicate these cold-type people have taken their selfish motives to the extreme. To be on ice or in ice or around ice means to be around people who have become so disconnected from their True Selves its like their heart has been hardened. In real life, people who create ice in the environment tend to be called things such as abusive, violent, or murderous.