A heat advisory has been issued in three southwestern states – Nevada, California, and Arizona – due to extremely hot temperatures expected to reach up to 120 degrees Fahrenheit (49 C). Health officials warn that drinking coffee can exacerbate dehydration caused by the heat.
Caffeine, found in coffee, is a diuretic, meaning it increases urine production, which can lead to fluid loss and dehydration if not replaced. This can cause blood volume to decrease, damaging vital organs such as the kidneys, heart, and brain.
The National Weather Service (NWS) advises people to avoid drinking energy drinks and soda, which are also diuretics. They recommend staying hydrated by drinking plenty of water or sports drinks instead.
In addition to avoiding coffee, health officials warn against eating high-protein meals in hot temperatures, as they raise body temperature due to increased energy expenditure. Officials suggest opting for foods with high water content, such as watermelon, berries, and melons, to help stay hydrated.
The warning comes ahead of a surge in heat-related deaths in the US, which have doubled over the past 25 years. The NWS has also issued a heat advisory for Alaska, where temperatures are expected to reach 85 degrees Fahrenheit (29 C).
Source: https://www.dailymail.co.uk/health/article-14824747/americans-told-avoid-coffee-three-states-heat-wave.html