In recent days, various regions both within and outside of Spain have been experiencing a phenomenon that complicates daily life: high humidity . This weather condition is characterized by a combination of high temperatures and an atmosphere laden with water vapor, which not only increases the perceived temperature but also leads to a series of effects on health, well-being, and the occurrence of adverse weather events.
The impact of high humidity goes far beyond physical discomfort. When the air is saturated with moisture, the human body finds it more difficult to regulate its temperature through perspiration, which increases the risk of heat exhaustion and heat stroke, and exacerbates symptoms of respiratory conditions.
Regions under the influence of high humidity
During the second week of July, many Spanish towns and cities recorded relative humidity levels above 70% , with figures approaching or even reaching 100% at times, mainly during the early morning hours and after periods of light rain. For example, in Algeciras , the relative humidity reached 89%, intensifying the muggy conditions and causing the perceived temperature to far exceed the actual temperature shown on the thermometer. In Ceuta, the humidity reached 90%, making the perceived temperature approach 33°C even though the actual high was only around 29°C.
In Almansa , forecasts have indicated maximum humidity levels of 100% for several days, coinciding with periods of light rain or cloudy skies. This combination has intensified the feeling of oppression, especially on hot days, such as when the mercury approaches 37°C. In Elche , the pattern is similar: Wednesday is expected to have humidity levels of 73%, with highs of 30°C and a heat index exceeding 32°C.
Across the Atlantic, cities like New York have also been affected by the tropical humidity. The heat index—which estimates the actual felt temperature taking humidity into account—has reached values ​​as high as 38°C, prompting authorities to issue alerts for the risk of heatstroke and extreme weather events such as thunderstorms and flash floods.
Health consequences: from embarrassment to respiratory crises
The combination of high temperature and high humidity creates a sweltering environment that can be especially harmful to the elderly, children, pregnant women, and people with chronic illnesses. Respiratory medicine experts warn that humidity promotes the proliferation of dust mites and mold, in addition to increasing the presence of pollutants and hindering the dispersion of harmful particles in the air.
In summer, asthma patients are more susceptible to exacerbations of their condition. Excessive humidity, along with increased tropospheric ozone and pollution, acts as a trigger for symptoms. Humid air makes it harder for the body to eliminate heat and, in combination with factors such as pollen or smog, increases the risk of asthma attacks and respiratory crises.
Sudden temperature changes between indoors and outdoors can exacerbate these problems by inducing inflammatory responses in the respiratory tract. Therefore, it is recommended to maintain controlled temperature contrasts and exercise extra caution on days with high humidity.
Relevant weather forecasts and warnings
The State Meteorological Agency (AEMET) and other meteorological services emphasize the importance of paying attention to weather bulletins and warnings. Several areas are experiencing a high probability of light rain , cloudy periods, and variable winds, which are keeping humidity levels high.
In cities like Almansa and Elche, unstable periods alternate, with scattered showers and episodes of intense heat. New York , meanwhile, has been on alert due to the arrival of cold fronts that combine with masses of air laden with tropical moisture, leading to intense thunderstorms and potential urban flooding.
Humid atmospheric conditions combined with intermittent rainfall and high temperatures are conducive to extreme events, including flash flooding in urban areas where drainage systems are inadequate.
Recommendations for coping with high humidity
Given this scenario, experts and health authorities have prepared a series of tips to mitigate the effects of humidity and heat:
- Drink water frequently, even if you are not thirsty, to avoid dehydration.
- Avoid intense physical activity during the hours of maximum heat and humidity.
- Wear light, light-colored, breathable clothing.
- Ventilate homes during the coolest hours of the day and keep the blinds down during the hottest hours.
- Use appropriate sunscreen and wear approved sunglasses to protect yourself from ultraviolet radiation, which reaches very high levels these days.
- Never leave people or pets in parked vehicles., even if only for short periods.
- Pay special attention to elderly people, children and people with respiratory illnesses.
In areas under weather alert, it is essential to consult official forecasts and follow all recommendations.
The persistent humidity during the summer months poses a challenge to public health and requires us to adapt our routines and take precautions. Although the rains provide some relief from the temperatures, high humidity continues to cause discomfort and the risk of respiratory problems, making it essential to monitor the forecast and act responsibly to prevent complications.
