As the effects of climate change intensify, one of the less-discussed yet increasingly evident consequences is its impact on sleep quality. Residents of Los Angeles and the broader Southern California region are experiencing warmer temperatures, even during the night, leading to a growing concern over the quality of sleep. 

As unseasonably warm temperatures become more frequent and intense, the consequences for sleep are becoming more severe and widespread.

The Link Between Temperature and Sleep Quality

Human sleep patterns are closely tied to our body’s internal temperature regulation. The body naturally cools down as we prepare for sleep, reaching its lowest point during the early morning hours. 

This drop in core temperature helps to facilitate deep, restorative sleep. However, when external temperatures remain high, especially at night, it can interfere with this natural process, making it difficult to fall and stay asleep.

For those living in Southern California, where summer nights have historically been cooler due to ocean breezes, the rising nighttime temperatures are a noticeable and troubling change. The region’s typically temperate climate has been increasingly replaced by warmer nights, which can lead to difficulty in falling asleep, frequent awakenings, and shorter sleep durations.

The Role of Climate Change in Unseasonably Warm Nights

Climate change is driving up average temperatures globally, and Southern California is no exception. According to climate scientists, the region has seen a significant increase in the frequency of heatwaves and unusually warm nights. 

The phenomenon known as the “urban heat island” effect—where urban areas experience higher temperatures than their rural surroundings—exacerbates the situation in cities like Los Angeles. Concrete, asphalt, and other materials common in urban environments absorb heat during the day and release it slowly at night, keeping temperatures elevated.

As a result, the number of “tropical nights” (nights where the temperature does not drop below 68°F or 20°C) has been increasing. This is particularly problematic because it deprives the body of the cooler environment it needs for optimal sleep. With climate models predicting further increases in both daytime and nighttime temperatures, the outlook for sleep quality in the region is concerning.

Health Consequences of Poor Sleep

The health implications of disrupted sleep due to warmer temperatures are significant. Poor sleep is associated with a host of negative outcomes, including reduced cognitive function, impaired mood, and a weakened immune system. Chronic sleep deprivation can increase the risk of serious health conditions such as heart disease, diabetes, and obesity.

For vulnerable populations, including the elderly, children, and those with pre-existing health conditions, the impact of poor sleep can be even more severe. In addition, individuals who work night shifts or have irregular sleep patterns may find it particularly difficult to adapt to the warmer nights, further exacerbating the health risks.

Coping Strategies for Warmer Nights

While the broader issue of climate change requires systemic solutions, there are steps individuals can take to mitigate the impact of warmer nights on their sleep:

• Invest in Air Conditioning: While not everyone has access to air conditioning, for those who do, using it strategically during the night can help maintain a cooler bedroom environment.
• Use Fans and Natural Ventilation: Fans can help circulate air, and opening windows (when it is safe to do so) can allow cooler air to enter the home. Cross-ventilation, where windows on opposite sides of the house are opened, can be particularly effective.
• Choose Lightweight Bedding: Light, breathable fabrics like cotton or Frankenmuth Wool can help regulate body temperature and prevent overheating during the night.
• Take a Cool Shower Before Bed: A cool shower can lower your body temperature and help you relax before sleep.
• Stay Hydrated: Dehydration can exacerbate the feeling of heat, so it’s important to stay well-hydrated throughout the day and before bed.

The Need for Long-Term Solutions

While individual actions can provide some relief, addressing the root cause of the problem—climate change—is essential. Local governments in Southern California and beyond must continue to pursue policies that reduce greenhouse gas emissions and mitigate the effects of climate change. This includes investing in green infrastructure, enhancing urban cooling strategies, and promoting energy-efficient buildings.

Moreover, public awareness of the connection between climate change and sleep quality should be raised. By understanding the full scope of the impact, individuals and communities can better advocate for the necessary changes to protect public health.

The unseasonably warm temperatures experienced in Los Angeles and Southern California are more than just a discomfort—they are a threat to the quality of sleep and, by extension, overall health. As climate change continues to alter weather patterns, the challenge of maintaining good sleep hygiene will likely become more pronounced. 

By taking proactive steps and advocating for systemic change, we can work to preserve both our sleep quality and our environment.

Published by: Khy Talara