Being at a high altitude can expose you to more than the thin air and cold winds. The sun itself is a major danger. In the Himalayas extreme UV (UV) radiation could cause intense sunburn, dehydration, as well as blindness to snow even on cloudy or cool days.
We at trekUp India We frequently witness trekkers ignoring the sun's exposure because temperatures are low. This is among the most frequently made mistakes at high altitudes. Sun protection isn't only an option but an vital safety requirement in any over-the-top trek.
Why Sun Protection Is Critical at High Altitude
Thinner Atmosphere = Higher UV Exposure
Higher elevations mean that the air is less dense and able to filter out ultraviolet radiation. The exposure to UV radiation increases by around 10-12 percent for every 1,000 meters increased in altitude, significantly increasing the chance of eye and skin injuries.
Snow and Ice Reflection
Snow is able to absorb up to 80percent of UV rays and expose trekkers from the above as well as below. This greatly increases the chance of:
- Severe sunburn
- The condition is known as snow blindness (photokeratitis)
Cool Temperatures Mask Damage
Cold weather can hide early signs of sunburn which causes trekkers to notice the harm only after a severe injuries have already taken place.
Essential High-Altitude Sun Protection Measures
1. Use High-SPF, Broad-Spectrum Sunscreen
- Select SPF 50+ with broad-spectrum (UVA + UVB) for protection
- Use sunblock 30 minutes prior to exposure
- Apply each two hours or more often when you are sweating
Do not overlook areas of vulnerability:
