In the heart of Los Angeles, a concerning trend is emerging: wealthy, white neighborhoods are losing their heat shields. This phenomenon, known as the “luxury effect,” has long been observed in urban areas, where wealthier neighborhoods tend to have more plants and trees, which help to cool the air. However, as the climate warms, this effect is rapidly weakening.
A recent study by the University of California, Los Angeles, found that between 1985 and 2021, the average temperature in Los Angeles increased by 8.4°F. While the rate of warming was slower in wealthier neighborhoods, no neighborhoods actually got cooler. The researchers believe that this is because plants are becoming stressed by the heat and drought.
“We found that plants are not able to keep up with the increasing heat,” said lead author Dr. David J. Allen. “They are becoming stressed and dying, and this is reducing their ability to cool the air.”
The study also found that some wealthy residents are planting water-wise gardens, which do not provide as much cooling as trees and shrubs. This is because water-wise gardens typically use drought-tolerant plants, which are not as effective at shading and absorbing heat.
“The trend toward water-wise gardens is a double-edged sword,” said Allen. “On the one hand, it is important to conserve water, especially in a drought-prone region like California. On the other hand, these gardens do not provide as much cooling as traditional gardens.”
The researchers warn that if these trends continue, there will be no income advantage for white residents when it comes to cooling from plants by 2030.
“This is a serious equity issue,” said Allen. “Wealthier residents have long enjoyed the benefits of cooler temperatures, but this advantage is now disappearing. This could have a significant impact on their health and well-being.”
The loss of heat shields in wealthy white neighborhoods is a serious problem that demands attention. By taking steps to increase tree cover, promote water-wise landscaping, and invest in green infrastructure, we can help to mitigate the effects of climate change and protect the health and well-being of all residents.