Summer in Knoxville brings bright days, busy parks, and plenty of time outdoors but it also brings intense heat and humidity. Whether you’re enjoying the river views at Sequoyah Hills, walking the trails at Ijams, or spending time outside with family, staying aware of heat-related symptoms is crucial. Understanding how heat exhaustion differs from heatstroke can help you react quickly and prevent a dangerous situation. 

What Is Heat Exhaustion and How It Starts 

Heat exhaustion occurs when your body gradually overheats, often due to high temperatures, humidity, or physical activity. Common signs include: 

• Heavy sweating and pale, cool, or clammy skin 
• Fatigue, weakness, or dizziness 
• Headache, muscle cramps, nausea, or feeling faint 
• A rapid but weak pulse, increased thirst, or decreased urination 

If untreated, heat exhaustion can progress into heatstroke so it’s essential to take these symptoms seriously. 

Heatstroke: When It’s an Emergency 

Heatstroke happens when the body’s temperature-regulation system fails and core temperature rises to dangerous levels. This is a medical emergency requiring immediate care. Warning signs include: 

• Very high body temperature (104°F or higher) 
• Hot, dry, or flushed skin — sweating may stop 
• Rapid pulse and fast, shallow breathing 
• Confusion, irritability, slurred speech, dizziness, or loss of consciousness 
• Nausea or vomiting 
• If you suspect heatstroke, call 911 or seek emergency care right away. Every minute matters. 

First-Aid & Prevention Tips 

• Whether you’re gardening at home, spending the day at a Knoxville park, or walking your favorite Urban Wilderness trail, you can lower your risk by: 
• Drinking water consistently throughout the day 
• Avoiding strenuous outdoor activity between 10 a.m. and 4 p.m. 
• Wearing lightweight, breathable, light-colored clothing and using sun protection 
• Taking frequent breaks in shaded or air-conditioned areas 
• Slowing down and cooling off immediately if you notice dizziness, nausea, or heavy sweating 

When to Get Medical Care 

Heat exhaustion often improves with rest, hydration, and cooling down but you should seek medical attention if you or someone else experiences: 

• Confusion, disorientation, or slurred speech 
• Fainting or loss of consciousness 
• A rapid or irregular heartbeat 
• Severe nausea or vomiting 
• Symptoms that continue or worsen despite cooling measures 

Heat-related illnesses can escalate quickly, but recognizing early symptoms and knowing when to get help can prevent serious complications. If symptoms worsen or you’re unsure what you’re experiencing, AFC Knoxville is here with quick, convenient walk-in care to help you recover safely.