Do you need electrolytes? Will tea cool you down? Is it safe to drink beer? How to stay hydrated in a heatwave

What it is about

As the United Kingdom experiences a heatwave, The Guardian examines the science behind staying hydrated during hot weather, moving beyond the assumption that plain water is always the best choice. The article addresses common questions about whether specialised drinks like electrolyte solutions offer advantages over water, whether hot beverages such as tea can help cool the body, and whether alcohol—particularly beer—is safe to consume during extreme heat. The piece synthesises scientific evidence to guide readers on hydration timing and the practical trade-offs of different drink choices when temperatures rise and the body loses water more rapidly than usual.

Who reported it

The Guardian published the focal story on hydration during heatwaves, examining electrolytes, tea, and alcohol consumption based on scientific evidence.

BBC reported complementary weather coverage, noting that temperatures are expected to drop this week with some rain, though relief may be short-lived with a possible return to hot weather at the weekend.

Public reactions

(This reflects general patterns in public discourse around heatwaves and health guidance, not specific quoted posts or verified figures.)

Public engagement with heatwave hydration advice tends to divide along practical and sceptical lines. Many people welcome clear scientific guidance that moves beyond "drink water" simplicity, particularly those interested in optimising performance during exercise or outdoor work. Others express frustration with what they perceive as contradictory or overly complicated health messaging—concerns that intensify when expert sources appear to endorse previously discouraged options like tea or alcohol. A common thread is concern about vulnerable populations (the elderly, young children, outdoor workers) and whether general advice adequately addresses their specific needs. Discussions often blend personal anecdotes about what "works" with requests for clearer, more actionable recommendations from authorities.

All sources

• The Guardian — Do you need electrolytes? Will tea cool you down? Is it safe to drink beer? How to stay hydrated in a heatwave
• BBC — Temperatures to drop this week but relief from heat may be short-lived