RNLI tells people to consider their health, cold water effects and weather conditions after disappearance of two swimmers on Christmas Day People in Britain planning on welcoming the new year by braving the winter weather for a swim in the sea have been warned of the dangers following the disappearance of two swimmers on Christmas Day. The Royal National Lifeboat Institution (RNLI) said the effects of cold-water shock, combined with weather conditions, pose a risk to anyone entering water that is 15C or below, especially at a time of year when the average sea temperature around the UK and Ireland is 6C to 10C. Continue reading...