'Rule of six' surgeon says to follow during UK heatwave

Amid the UK heatwave, Professor Paul Lee, a joint preservation specialist, is stressing the need to avoid dehydration, which he calls a hidden danger. He's introduced the "rule of six," advising people to drink six 8-ounce glasses of water daily to stay hydrated. This is crucial because extreme heat can lead to severe dehydration, which can have serious health implications, especially for those with pre-existing conditions. His guidance is vital as it highlights how everyday habits can significantly impact health during extreme weather events.