FWIW, I've just taken my SATs reading with an oximeter, I'm usually in the 98/99% level but today sitting in my kitchen, which is the coolest part of the house my SATs are 93%. Why? High temperature + high humidity. I'm fine but if I was in a very hot and humid room for several hours, I suspect I wouldn't be although generally I'm fitter than most people in their late 70's. We currently have contractors in making hay from our land. They have huge modern tractors with air con so they'll be OK but it would be impossible to do the job as it was done a few years ago with open tractors and the manual handling of bales. This weather is unlike the hot summer days we have experienced in the past and we are going to have to adapt our working practices to accommodate it.
"The main reasons include:The Oxygen Dissociation Curve: Increased core body temperature shifts this curve—which measures the relationship between hemoglobin's affinity for oxygen and blood pressure—to the right, reducing hemoglobin's overall affinity for oxygen and resulting in lower SpO2 readings.
High Humidity & Air Density: Warm, humid air is less dense and holds more water vapor, leaving less room for oxygen molecules per breath. This makes your lungs work significantly harder to deliver the same amount of oxygen to your tissues.
Increased Vasodilation: To dissipate heat, your blood vessels dilate, causing a drop in central blood volume and forcing your heart to work harder, placing extra physical strain on your cardiovascular and respiratory systems.
Dehydration: Sweating and fluid loss can cause your blood pressure to drop and dry out your bronchial tubes, leading to shortness of breath" AI generated