Dr. David Eisenman from UCLA is an expert on how extreme heat affects public health. He studies the “urban heat island effect,” where cities like Los Angeles are considerably warmer than the surrounding areas. This effect occurs because materials like asphalt and concrete absorb heat during the day and release it at night, leading to hotter nights in densely populated neighborhoods.
Research shows that low-income areas, particularly those with less vegetation, experience more heat-related health issues. Heat maps indicate that neighborhoods in South Los Angeles, the San Fernando Valley, and East LA often suffer from higher emergency room visits during heat waves. Communities that were once redlined face even more heat-related risks. Minority groups, especially Latino and Black communities, are disproportionately affected due to these environmental factors.
In fact, increasing tree canopies and making roofs and pavements more reflective can lower temperatures by up to 2 degrees Celsius during heat events. This could result in 25% to 50% fewer emergency room visits, especially in vulnerable communities that see high excess rates of heat-related health issues.
Heat is actually the leading weather-related cause of death, but it often goes unnoticed. Unlike hurricanes or wildfires, heat-related deaths happen quietly, often overlooked by society. In Los Angeles, extreme heat notably affects people experiencing homelessness, a group that is often hidden from view. Interestingly, researchers at UCLA found that wildfire smoke may now be an even larger climate-related killer, contributing to over 52,000 premature deaths in California between 2008 and 2018.
When it comes to managing heat without air conditioning, simple actions can make a big difference. At temperatures above 95 degrees Fahrenheit, using a fan can circulate hot air and worsen dehydration. Instead, applying cold water to areas like the neck and groin or taking cool showers helps lower body temperature effectively. Access to air-conditioned spaces is crucial, as studies indicate that communities with better access see lower heat-related mortality rates.
Checking on neighbors or elderly relatives during long heat waves can be life-saving. Personal visits are key, as they allow you to assess whether someone needs water or assistance. In neighborhoods with strong community ties, residents have historically faced lower heat-related death rates, even when controlling for income levels.
Many people think living in a warm climate makes them immune to the dangers of heat waves. This is a misleading belief. Our bodies adapt to heat only through consistent exposure, and most Californians, especially along the coast, do not experience extreme temperatures frequently. Climate experts predict that heat waves will become more common, especially with increasing humidity at night, making them more dangerous.
By understanding heat’s impact and how to help ourselves and each other, we can better prepare for future heat challenges.
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heat, climate change, research, environment
