As summer ramps up and temperatures soar, it’s easy to think of heat waves as little more than an uncomfortable inconvenience. However, for many people, especially those with heart conditions or other health issues, extreme heat can pose a significant and potentially life-threatening threat.
At Rescue One Training for Life, we’ve always focused on life-saving training and public awareness. However, sometimes saving lives begins with understanding how your body responds to its environment and recognizing the warning signs before things escalate from uncomfortable to critical. So let’s talk about the heat. Not just the sweat, the sunburns, or the record-breaking forecasts, but what’s really happening inside your body when the mercury climbs into dangerous territory.
When the air is hot and heavy and your body’s natural cooling system is pushed to its limits, your heart steps in to help. You might not feel it at first, but your cardiovascular system works harder with every degree that ticks upward. The heart begins pumping more blood to the skin, trying to push heat outward and cool you down. This increased circulation, while helpful, isn’t free; it demands more from your heart, and that extra strain can trigger serious consequences for people who already have cardiac risk factors.
Even people who don’t consider themselves high-risk aren’t immune. Heat exhaustion, dehydration, and the early stages of heat stroke can sneak up on anyone, especially children, older adults, and individuals who work or exercise outside. Your body loses fluids more quickly in the heat, and with that comes a decrease in blood volume. The heart has to work even harder to compensate, and for someone with an already weakened system, this can become dangerous in a matter of minutes.
Most of us don’t associate summer barbecues or afternoon jogs with emergency room visits. But the reality is this: extreme heat is one of the most deadly forms of weather in the United States. It causes more deaths each year than floods, hurricanes, or tornadoes combined. That’s not a statistic we hear very often, but it should be.
The effects of extreme heat don’t show up the same way for everyone. Some people start to feel dizzy or lightheaded. Others might become unusually tired or even confused. You may stop sweating altogether, ironically, a sign that your body is no longer able to cool itself. These symptoms aren’t just signs that you’ve been out in the sun too long. They’re potential indicators of a medical emergency.
In our training programs, we often talk about recognizing early signs of cardiac arrest, stroke, or trauma. But extreme heat is one of those silent threats that doesn’t get enough attention. And as with most emergencies, timing is everything. If someone becomes unconscious during a heatwave or collapses while outside, seconds count. This is where having CPR training and access to an AED can truly make the difference between life and death.
We also can’t overstate the importance of staying connected. If you live alone, check in with someone during especially hot days. If you have elderly neighbors, knock on their door. Make sure fans are running, AC is working, and that they’re drinking water throughout the day. Dehydration isn’t always obvious until it’s too late, and it can set off a cascade of health problems quickly.
Even your medications can play a role. Many prescriptions, especially diuretics or those used to control blood pressure, can alter your body’s fluid balance or make you more sensitive to heat. If you’re unsure how your medication might affect you during a heatwave, talk to your doctor or pharmacist. It’s better to be safe than sorry.
And, of course, never underestimate the risks associated with hot cars. Every summer, we hear tragic stories about children or pets being left behind for “just a minute.” The temperature inside a vehicle can rise rapidly in seconds, even with the windows cracked. It’s not a warning meant to scare people; it’s a reality that we have the power to prevent.
At Rescue One, our mission is to prepare people for the unexpected. Heat waves might not strike with the drama of a thunderstorm or a flood, but they’re no less deadly. The good news is that there are several steps you can take to stay safe. Keep cool, stay hydrated, and pay close attention to how your body feels. Listen to those little cues: fatigue, nausea, a racing heart. They might be trying to tell you something important.
And if something does go wrong, be ready. Whether it’s knowing how to perform CPR, recognizing the signs of heatstroke, or using an AED when someone collapses, preparedness saves lives.
As the temperatures climb and summer settles in, take care of yourself. Take care of your family. Take care of your community. We’ll be right here, helping you do just that.
