Why this heatwave feels worse than the last one
Why this heatwave feels worse than the last one
Why this heatwave feels worse than the last one has become a pressing concern for residents of England and Wales as the summer weather intensifies. This week marks the second significant heatwave of the year, with June temperature records expected to be broken in record time. While the previous heatwave brought mid- to high 30s Celsius temperatures, this current wave is different—it’s amplified by high humidity levels and the phenomenon of tropical nights, making it feel more oppressive than before. The combination of these factors is creating a more challenging environment for people to cope with, especially as the days stretch longer and the nights remain warm.
Heat dome dynamics and humidity impact
A heat dome—a massive high-pressure system that traps warm air—has emerged as the primary driver of this extreme weather. According to Dr. Akshay Deoras, a senior research scientist at the University of Reading, this atmospheric pattern leads to descending air that compresses and heats up as it reaches the surface, raising ground temperatures significantly. Unlike the May heatwave, which was centered over the UK, this week’s heat dome originates in the sub-tropical regions and has shifted northward, affecting France and now extending into the British Isles. The result is a steady influx of hot, moist air, which exacerbates the discomfort of high temperatures.
“This heatwave feels worse than the last one because the humidity levels are much higher, making the heat more insistent and harder to escape,” said Dr. Deoras. “The prolonged exposure to warm nights is also a critical factor that differentiates this event from previous ones.”
Comparisons to the 2022 record-breaking event
The current heatwave has drawn comparisons to the historic July 2022 event, which set unprecedented temperature records across the UK. However, the key difference lies in the environmental conditions. While 2022 saw a dry and intense heatwave, this June’s wave is accompanied by high humidity, which increases the "feels like" temperature. For instance, a 35°C air temperature might translate to 41°C when humidity is factored in, making it feel more severe. This shift from dry to humid conditions is particularly notable in the southern regions, where the heat is compounded by the lingering warmth of tropical nights.
Extended tropical nights and health risks
Tropical nights are becoming more frequent, with some areas in England and Wales experiencing temperatures that stay above 20°C throughout the night. These extended periods of warmth could set new June records, as Thursday night may mark the warmest overnight temperatures on record. Minimums in regions like Wales, the Midlands, and the South East are projected to range between 21°C and 23°C, surpassing the UK’s 22.7°C record from 1976 and Wales’ recent 20.3°C mark. The prolonged exposure to high temperatures during the night is a major contributor to why this heatwave feels worse than the last one, as it prevents the body from cooling down and recovering.
High humidity levels during these nights further intensify the heat, with "feels like" temperatures potentially reaching 27°C even in the coolest moments. This is a marked departure from past heatwaves, where tropical nights were rare and short-lived. The continuous warmth now poses a greater risk to vulnerable populations, including the elderly and those with chronic illnesses. Heat exhaustion and strain on cardiovascular systems are becoming more common, even among individuals who are physically fit.
Adapting to extreme heat
As global temperatures rise, events like this heatwave are expected to become more frequent and severe, requiring a shift in how society prepares for them. Understanding the mechanisms behind why this heatwave feels worse than the last one is essential for developing effective coping strategies. One key adaptation is ensuring access to cooling spaces, such as shaded areas or air-conditioned environments, especially during the hottest parts of the day. Staying hydrated, wearing breathable clothing, and adjusting daily routines to avoid peak heat hours are also vital steps.
Additionally, the prolonged duration of this heatwave highlights the importance of long-term planning. Communities are being urged to invest in infrastructure that can withstand extreme temperatures, such as improved public transportation and emergency response systems. The psychological impact of sustained heat should not be overlooked either, as the relentless warmth can lead to increased stress and fatigue. By focusing on both immediate and future solutions, individuals and governments can better mitigate the effects of why this heatwave feels worse than the last one.
With the combination of high humidity, tropical nights, and a more intense heat dome, the current heatwave presents a unique challenge. Unlike previous events, which were shorter and less persistent, this one is testing the limits of both natural and human systems. As the temperatures continue to rise, the need for adaptive strategies and awareness of why this heatwave feels worse than the last one becomes even more critical. The coming days will be a crucial indicator of how the UK’s climate is evolving, and whether residents can find ways to endure and thrive through these extreme conditions.