Tehran's Heat, Light, and Noise Disrupt Sleep Quality for Millions

As summer heat peaks in Tehran, restless nights and fatigued mornings are becoming the new normal for many residents across the capital’s neighbourhoods. Researchers at the Institute for Environmental Science and Technology at Sharif University have linked room temperature, city light and urban noise as primary disruptors of sleep in metropolitan Tehran-bringing sleep health to the forefront of wellbeing conversations this July.

Urban Pressures: Why Sleep Quality Matters Now

Why now? This month, the Civil Defense Organization reminded Tehran residents of the health risks of prolonged high temperatures and poor sleep. Record daytime highs-often above 38°C-combine with fast-paced urban life to make restorative sleep harder to come by. With national entrance exams and work commutes pressing heavy on daily schedules, sleep health has become both an individual and citywide priority. Tehran’s active wellness community, including neighbourhood gyms and yoga studios from Valiasr Street to Shahrak-e Gharb, is also increasingly adding sleep education to their programmes as demand for holistic health grows.

In central districts like Abbas Abad and bustling Yusef Abad, residents commonly report night-time temperatures in poorly insulated flats climbing above 30°C after midnight. Meanwhile, light pollution from the ever-lit North Kargar Street and late-night cafés creates a constant glow, making it difficult for the body to produce melatonin-the hormone responsible for sleep regulation. Noise from traffic, motorbikes, and ongoing construction frequently spikes above 70 decibels along Imam Khomeini Street, disrupting sleep cycles for thousands of neighbours.

Understanding the Disruptors: Data from Tehran

According to the Tehran Municipality’s Environmental Monitoring Center, noise levels in central Tehran regularly exceed the World Health Organization’s recommended safe threshold of 40 decibels at night. A 2025 survey by the Sleep Medicine Clinic at Atieh Hospital found that 62% of respondents in Tehran reported difficulty falling or staying asleep, with most blaming city noise and night-time heat as the main factors. Sleep specialists at the clinic now recommend blackout curtains-widely available in Laleh Park’s home décor shops for about 2 million toman per pair-and sound machines or simple earplugs (starting around 100,000 toman at local pharmacies) to help mitigate these effects.

One newcomer: several residential complexes in Niavaran now offer soundproof window upgrades as part of summer maintenance packages, a response to repeated community complaints about night-time noise and light.

Practical Steps: What Tehran Residents Can Try Next

City health authorities advise Tehranis to prioritize sleep hygiene habits during the hot months: keep bedroom temperatures between 18°C and 24°C with evaporative coolers or fans (portable models range from 2-5 million toman at Mahdavi Electronics in Tajrish), avoid blue light screens an hour before bed, and limit night-time caffeine. Residents living near major streets like Modarres Expressway are encouraged to invest in thick curtains and use smartphone decibel meters to monitor home noise levels, reporting persistent problems to local municipality offices for follow-up.

Mental health experts at Tehran’s Iranian Psychologists’ Association on Beheshti Street note that even incremental improvements-a cooler room, darker curtains, or muffled noise-can make a tangible difference to mood, energy, and productivity. As the city’s summer intensifies, more citizens are waking up to the reality: quality sleep is not just a matter of comfort, but a foundation for every other aspect of wellness in Tehran.