The United Kingdom has experienced record-breaking temperatures in May, resulting in significant public health risks and multiple fatalities associated with open-water immersion and heat-related illness.

英國在五月經歷了打破紀錄的高溫，導致顯著的公共衛生風險，並出現多起與開放水域浸水及熱相關疾病相關的死亡病例。

Meteorological data indicate a provisional record high of 34.8°C at Kew Gardens, with subsequent forecasts suggesting peaks of 36°C. This thermal escalation has necessitated the extension of amber health alerts by the UK Health Security Agency (UKHSA) across several English regions, including London and the South East. The UKHSA has indicated that such conditions are likely to result in increased mortality, particularly among cohorts aged 65 and older or those with comorbid conditions. Furthermore, the occurrence of 'tropical nights,' where temperatures remain above 20°C, has been noted to disrupt sleep patterns and exacerbate physiological stress.

氣象數據顯示，邱園（Kew Gardens）暫時錄得 34.8°C 的最高紀錄，隨後的預測指出峰值可能達到 36°C。由於氣溫攀升，英國衛生安全局（UKHSA）不得不延長倫敦及東南部等數個英格蘭地區的琥珀色健康警報。UKHSA 指出，此類情況可能會導致死亡率增加，尤其是 65 歲及以上的人群或患有共病者。此外，出現了溫度維持在 20°C 以上的「熱帶之夜」，據觀察這會干擾睡眠模式並加劇生理壓力。

Clinical observations highlight a heightened prevalence of dehydration, which may manifest through non-traditional symptoms such as irritability, muscle cramping, and diminished skin turgor. Medical professionals have identified specific risk factors for certain populations; for instance, individuals utilizing GLP-1 receptor agonists (e.g., semaglutide) may experience increased fluid loss due to gastrointestinal side effects and suppressed thirst. Additionally, the use of electric fans during nocturnal hours has been cautioned against due to risks of electrical failure and the circulation of allergens.

臨床觀察強調脫水盛行率增加，其症狀可能表現為非傳統形式，如易怒、肌肉抽搐以及皮膚彈性降低。醫療專業人員已針對特定人群確定了風險因素；例如，使用 GLP-1 受體激動劑（如 semaglutide）的個體可能會因胃腸道副作用及口渴感降低而導致水分流失增加。此外，由於存在電氣故障及過敏原循環的風險，專家建議避免在夜間使用電風扇。

Concurrent with the heatwave, a series of fatalities occurred involving open-water swimming. Five deaths have been confirmed, including four teenagers and a man in his 60s, across locations such as Lincoln, Halifax, and Cornwall. The Royal National Lifeboat Institution (RNLI) and other safety bodies attribute these incidents to 'cold water shock,' a physiological response characterized by hyperventilation and tachycardia, which can incapacitate even proficient swimmers. In the professional sphere, the Health and Safety Executive (HSE) maintains that while no statutory maximum temperature for labor exists, employers are obligated to mitigate heat stress and provide adequate hydration and ventilation to ensure workforce safety.

與熱浪同時發生的是一系列與開放水域游泳相關的死亡事件。在林肯（Lincoln）、哈利法克斯（Halifax）及康沃爾（Cornwall）等地，已確認五人死亡，包括四名青少年及一名 60 多歲的男子。皇家國家救生艇協會（RNLI）及其他安全機構將這些事件歸因於「冷水衝擊」，這是一種以過度換氣和心跳過快為特徵的生理反應，甚至能使熟練的游泳者失去能力。在專業領域，健康與安全執行局（HSE）維持認為，雖然法律並未規定勞動最高溫度，但僱主有義務減輕熱壓力，並提供足夠的水分與通風以確保勞動力安全。

The current situation remains critical as health alerts persist, with a focus on mitigating dehydration and preventing further open-water accidents.

由於健康警報持續，目前情況依然危急，重點在於減輕脫水情況並防止進一步的開放水域事故。