Houston Heat: Sidewalk Asphalt Melting Skin Lasers?

By Franklin Everett Shaw

November 9, 2025

The air in Houston in August isn’t just hot; it’s a thick, suffocating blanket. You step outside, and it feels like you’re immediately wrapped in a damp towel fresh from the dryer. It’s a different beast than the dry heat of Arizona or Nevada. This humidity, combined with the relentless sun, creates a unique set of challenges for anyone living in or visiting the Bayou City.

This isn’t just about being uncomfortable. It’s about serious health risks like heatstroke and long-term skin damage. So, let’s dive into how to survive and thrive during a Houston summer, focusing on practical, actionable advice that goes beyond the usual sunscreen platitudes.

Understanding the Houston Sun and Heat

Houston’s latitude puts it closer to the equator than many other major US cities. This means a more direct angle of sunlight, leading to higher UV radiation levels, especially during the summer months. The humidity exacerbates the problem. Sweat doesn’t evaporate as easily, hindering the body’s natural cooling mechanisms.

A common misconception is that asphalt can melt your skin. While asphalt can get incredibly hot (reaching temperatures well over 150°F), it won’t instantly melt your skin like some sort of cartoon scenario. However, prolonged contact can certainly cause severe burns. Think about pets’ paws on hot pavement – the same principle applies to human skin.

Sun Protection: Beyond SPF 30

Sunscreen is crucial, but not all sunscreens are created equal, especially for Houston’s climate.

Broad Spectrum is Non-Negotiable: This means the sunscreen protects against both UVA and UVB rays. UVB rays are primarily responsible for sunburn, while UVA rays contribute to premature aging and skin cancer.
SPF 30 is the Minimum, Aim for SPF 50: SPF (Sun Protection Factor) indicates how long it will take for UVB rays to redden your skin compared to no sunscreen. SPF 30 blocks about 97% of UVB rays, while SPF 50 blocks about 98%. That extra 1% makes a difference in the long run.
Water Resistance is Key: Houston’s humidity means you’ll be sweating, even if you’re not actively exercising. Look for sunscreens labeled “water resistant” (40 or 80 minutes). Reapply every two hours, or immediately after swimming or sweating.
Consider Mineral Sunscreens: Mineral sunscreens (containing zinc oxide or titanium dioxide) are generally considered safer for sensitive skin and the environment. They work by physically blocking UV rays, rather than chemically absorbing them. Brands like EltaMD and Blue Lizard are popular choices.
Don’t Forget the Details: Apply sunscreen to often-overlooked areas like your ears, the back of your neck, the tops of your feet, and your lips (use a lip balm with SPF).

Heatstroke Prevention: A Proactive Approach

Heatstroke is a medical emergency. It occurs when the body’s temperature rises to 104°F (40°C) or higher. Symptoms include:

High body temperature
Hot, red, dry or moist skin
Rapid, strong pulse
Headache
Dizziness
Nausea
Confusion
Loss of consciousness

If you suspect someone is experiencing heatstroke, call 911 immediately. While waiting for help, move the person to a cooler location, remove excess clothing, and try to cool them down with cool water or ice packs.

Here’s how to prevent heatstroke in Houston:

Hydrate, Hydrate, Hydrate: Don’t wait until you’re thirsty to drink. Carry a water bottle with you and sip on it throughout the day. Electrolyte drinks (like Gatorade or Pedialyte) can be helpful, especially if you’re sweating a lot.
Time Your Outdoor Activities Wisely: Avoid strenuous activities during the hottest part of the day (typically between 10 am and 4 pm). If you must be outside, take frequent breaks in the shade or air conditioning.
Dress Appropriately: Wear loose-fitting, light-colored clothing. Dark colors absorb more heat. A wide-brimmed hat can protect your face and neck from the sun.
Know Your Limits: Pay attention to your body and don’t push yourself too hard. If you start to feel dizzy, weak, or nauseous, stop what you’re doing and find a cool place to rest.
Never Leave Anyone in a Parked Car: This is especially important for children and pets. Car interiors can heat up to dangerous temperatures in a matter of minutes, even on a cloudy day.

Houston Resources: Cooling Centers and More

The City of Houston and Harris County operate cooling centers during the summer months. These are air-conditioned public spaces where residents can escape the heat. You can find a list of cooling centers on the City of Houston’s website or by calling 311.

Many community centers and libraries also offer air-conditioned spaces. Check with your local branch for hours and availability.

Specific Advice for Outdoor Workers and Athletes

Outdoor workers and athletes face a higher risk of heat-related illnesses due to prolonged exposure to the sun and heat.

Acclimatization is Key: Gradually increase your exposure to the heat over a period of several days or weeks. This will allow your body to adapt and become more efficient at cooling itself.
Frequent Breaks are Essential: Take short, frequent breaks in the shade or air conditioning. Use these breaks to rehydrate and cool down.
Buddy Up: Work or train with a partner so you can monitor each other for signs of heat stress.
Consider Cooling Vests or Towels: These can help to lower your body temperature and reduce the risk of heatstroke.
Electrolyte Replacement is Crucial: Sweat contains electrolytes, which are essential for proper muscle function and hydration. Replenish these electrolytes with sports drinks or electrolyte tablets.
For Athletes: Adjust training schedules to avoid the hottest part of the day. Focus on hydration and electrolyte replacement before, during, and after workouts. Consider indoor training options when possible.

Debunking Myths: Asphalt and Other Urban Legends

Let’s address some common myths about Houston’s heat:

Myth: Asphalt will melt your skin instantly. As mentioned earlier, while asphalt can get extremely hot and cause burns with prolonged contact, it won’t melt your skin on immediate touch.
Myth: You don’t need sunscreen on cloudy days. UV rays can penetrate clouds, so you still need to wear sunscreen even when it’s overcast.
Myth: Drinking beer will keep you hydrated. Alcohol is a diuretic, which means it can actually dehydrate you. Stick to water or electrolyte drinks.

Product Recommendations for Extreme Heat

Sunscreen: EltaMD UV Clear Broad-Spectrum SPF 46 (for face), Blue Lizard Australian Sunscreen (for body), Supergoop! Unseen Sunscreen SPF 40 (for a lightweight option).
Electrolyte Drinks: Gatorade, Pedialyte, Nuun tablets.
Cooling Towels: Frogg Toggs Chilly Pad, Mission Cooling Towel.
Cooling Vests: TechKewl Phase Change Cooling Vest.
Wide-Brimmed Hats: Sunday Afternoons Adventure Hat, Tilley LTM6 Airflo Hat.

Common Mistakes and How to Avoid Them

Not applying enough sunscreen: Most people don’t apply enough sunscreen. You should use about one ounce (a shot glass full) to cover your entire body.
Not reapplying sunscreen frequently enough: Reapply sunscreen every two hours, or immediately after swimming or sweating.
Waiting until you’re thirsty to drink: By the time you feel thirsty, you’re already dehydrated. Drink water throughout the day, even if you don’t feel thirsty.
Wearing dark clothing: Dark colors absorb more heat. Wear light-colored clothing to stay cooler.
Overexerting yourself in the heat: Know your limits and don’t push yourself too hard. Take frequent breaks and listen to your body.

Houston summers are no joke. But with the right knowledge and preparation, you can protect yourself from sun damage and heatstroke and enjoy all that the city has to offer, even when the temperatures soar. Stay informed, stay hydrated, and stay safe, Houston!