Your body knows cold water is a threat:

• It instantly constricts blood vessels and slows circulation. That is the opposite of what the body needs for proper digestion, lymphatic flow, and detox.

• The lymph system needs heat (lymphatic baths for 60–90 minutes) to melt hardened congestion (plastic fats, chemicals etc.) so they can move out through the skin.

• Being in cold water does the opposite. It will slow/stop detox, cause sickness and it also forces the body to waste energy just rewarming itself.

• Same principle applies to cold food or drinks.

As a short conclusion:
Heat melts congestion and moves waste out. Being in the cold (any cold water, pools, lakes etc.) will make the body store the toxins.