This past week has brought the first real taste of a classic Missouri summer, but the heat we’ve experienced hasn’t been typical.
While hot weather is expected this time of year, what we’ve seen recently is a prolonged stretch of oppressive conditions, with temperatures in the upper 90s and heat index values consistently exceeding 105 degrees.
This is not just uncomfortable; it’s dangerous. What made this heat particularly impactful wasn’t just how high the temperatures climbed, but how long the heat lasted and how little relief came overnight.
High humidity levels have played a key role, and this is where the heat index becomes especially important. The heat index is a measurement that combines air temperature and humidity to reflect what it actually feels like to the human body. It accounts for how the body cools itself through the evaporation of sweat, which becomes far less efficient when the air is already saturated with moisture.
When it’s humid, your body can’t release heat as easily, leading to increased internal stress. Prolonged periods of this kind of heat have a cumulative impact on even the healthiest individuals. Our bodies don’t get the chance to fully recover, especially when nighttime lows stay well into the 70s and even near 80 in urban areas.
The risk of heat-related illness rises steadily with each passing day. People without air conditioning, outdoor workers, older adults, children, and those with chronic health issues are especially vulnerable. However, anyone can be affected if precautions aren’t taken.
And let’s not forget our pets. Dogs don’t sweat like we do. In fact, they pant to regulate their body temperature, but that becomes much less effective in hot, humid air.
Pavement temperatures can exceed 140 degrees in direct sunlight, which means even a short walk can lead to serious paw burns or heat stress. If you wouldn’t walk barefoot on the sidewalk, your pet shouldn’t either.
As this heat wave continues for a few more days, relief is in sight. Forecast models are now showing that the pattern will begin to weaken as we head into the upcoming weekend.
Temperatures may fall back closer to average for late June, and scattered storm chances may help break up the heat.
That said, there is still a lot of summer left, and more heat and humidity will surely be in our future. From my window, the skies are clear, and the sunshine looks inviting. But beneath that beauty lies real danger. Let’s stay smart, stay safe, and respect the heat.
–Dr. Nick
