Current Heatwave Marked by Contributing Environmental Factors

LONDON – A combination of atmospheric conditions is contributing to the uncomfortable nature of the current heatwave, according to meteorologist Simon King. These factors include increased humidity, diminished wind, and higher overnight temperatures.

King explained that previous heatwaves often featured drier air. The humidity present during this period makes the heat feel more pervasive. Humans cool through sweat evaporation, a process slowed by high humidity.

Wind also plays a role in heat perception. Stronger winds facilitate heat dissipation and the evaporation of sweat, offering a sense of relief. The current weather system includes calmer winds, reducing this cooling effect.

Additionally, nighttime temperatures remain elevated. King noted that past heatwaves frequently allowed temperatures to drop more significantly after sunset. Consistent warmth overnight limits the body's recovery period from daily heat exposure.