Houston Heat: Sunscreen Melting on Asphalt?

Photograph of Franklin Everett ShawBy Franklin Everett Shaw
December 29, 2025

The Houston sun doesn’t play. It’s a relentless, unforgiving force that can turn a pleasant afternoon into a painful memory. We all know the importance of sunscreen, but in Houston’s unique climate, simply slapping on any old bottle isn’t going to cut it. We need a strategic, informed approach to sun protection.

Choosing the right sunscreen in Houston is paramount. Forget SPF 15; you need SPF 30 at a bare minimum, and SPF 50 is preferable. Look for “broad spectrum” on the label. This means the sunscreen protects against both UVA and UVB rays. UVA rays contribute to aging, while UVB rays cause sunburn. Both can lead to skin cancer.

For those with fair skin, consider mineral sunscreens containing zinc oxide or titanium dioxide. These are generally less irritating and provide excellent broad-spectrum protection. EltaMD UV Clear Broad-Spectrum SPF 46 is a popular choice, even for those with sensitive skin or acne. It’s lightweight and doesn’t leave a greasy residue, a crucial factor in Houston’s humidity.

If you have darker skin, you might find that mineral sunscreens leave a white cast. Chemical sunscreens, which absorb UV rays, are often a better option. Look for formulations containing avobenzone, octinoxate, or oxybenzone. However, be aware that some studies have raised concerns about the potential environmental impact of oxybenzone, particularly on coral reefs. Consider alternatives if you plan on swimming in the Gulf. Black Girl Sunscreen SPF 30 is a great option formulated specifically for melanin-rich skin, avoiding the dreaded white cast.

For outdoor workouts at Memorial Park or attending an Astros game at Minute Maid Park, you need a water-resistant or sweat-resistant sunscreen. These are designed to stay put even when you’re sweating profusely. Neutrogena Ultra Sheer Dry-Touch Water Resistant Sunscreen SPF 55 is a widely available and effective option. Reapplication is key, especially after heavy sweating. Aim to reapply every two hours, or immediately after toweling off.

Applying sunscreen correctly is just as important as choosing the right product. Most people don’t use enough. You should apply about one ounce (a shot glass full) to your entire body. Don’t forget often-missed areas like your ears, the back of your neck, and the tops of your feet. Apply sunscreen 15-30 minutes before going outside to allow it to bind to your skin.

A common mistake is applying sunscreen only when it’s sunny. UVA rays can penetrate clouds, so you need sunscreen even on overcast days. Another pitfall is relying solely on sunscreen. Sunscreen is just one part of sun protection. Wear protective clothing, such as long sleeves and wide-brimmed hats, especially during peak sun hours (10 AM to 4 PM). Seek shade whenever possible.

Proper sunscreen storage is often overlooked. Heat can degrade sunscreen, making it less effective. Don’t leave your sunscreen in your car, especially during the summer. The extreme heat inside a parked car can significantly reduce its SPF. Store your sunscreen in a cool, dry place, like a cabinet or drawer. Check the expiration date on your sunscreen. Expired sunscreen may not provide adequate protection.

Recognizing heat-related skin damage is crucial. Sunburn is the most obvious sign, but heat rash and heatstroke are also possibilities. Sunburn symptoms include redness, pain, and blistering. Heat rash appears as small, red bumps, often in areas where skin rubs together. Heatstroke is a medical emergency characterized by high body temperature, confusion, and rapid pulse.

If you experience sunburn, get out of the sun immediately. Apply cool compresses to the affected area and take a cool shower or bath. Use a moisturizer containing aloe vera to soothe the skin. Drink plenty of fluids to stay hydrated. For heat rash, keep the affected area clean and dry. Wear loose-fitting clothing. If you suspect heatstroke, call 911 immediately. While waiting for medical assistance, move the person to a cool place and try to lower their body temperature with cool water or ice packs.

Living in Houston means embracing the outdoors, but it also means taking sun protection seriously. By choosing the right sunscreen, applying it correctly, and taking other precautions, you can enjoy the Houston sunshine safely. Don’t underestimate the power of the sun, and don’t take shortcuts when it comes to protecting your skin. Your health depends on it.

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