High humidity makes our bodies' efforts to naturally cool us less effective
High temperatures are not the only concern during a summer heat wave, according to Environment Canada senior climatologist David Phillips, who says humidity plays a major role in how the body handles hot weather.
Phillips said humidity is always present in the atmosphere, but people notice it most when levels rise, and creates discomfort:
He explained that the body cools itself through sweating, but high humidity makes that process less effective, because sweat cannot evaporate as easily:
Southern Ontario experienced its first major heat wave of the summer around Canada Day, with humidex values reaching as high as 45 to 48 in some areas, and things have not improved significantly, and might not for quite a while:
Phillips says heat and humidity can lead to health concerns including fatigue, heat cramps, heat exhaustion and heat stroke, particularly for older adults and infants.
It is always recommended to check on anyone you know who is more vulnerable and at higher risk, especially those with health conditions that are exacerbated by exposure to heat and humidity.
