The East LA/Verdugos climate zone encompasses the end of the 101 freeway and holds Griffith Park and Dodger Stadium in it. Further inland than its counterparts, the East LA/Verdugos climate zone is subject to periods of extreme heat, the urban heat island effect, air pollution, and wildfires. There are a lot of ways to adapt our neighborhoods to better deal with these effects, ways to plan our cities more sustainably to avoid future impact. We’ll explore some solutions and concepts that can be tailored at the neighborhood level in these slides.
East LA/Verdugos sees an average of 4 days of extreme heat (days above 95°F) throughout a given year. That number is projected to increase to 9 days sometime between 2041-2060 if we don’t lower greenhouse gas emissions. The end of the century is even more concerning, where extreme heat days are expected to more than double to 21 by 2070-2099. Still, those numbers can be reduced to 6 days of extreme heat per year for mid-century and 10 days per year for end of century projections if aggressive steps are taken now to reduce greenhouse gas emissions.
Urban heat islands typically push temperatures up 1.8-5.4°F during the day and as much as 22°F in the evening. Overall electricity demand and peak demand will continue to grow as more people stay inside in these hot, condensed areas. Higher energy demand will strain electrical grids, and lead to rolling blackouts. Extreme heat kills more people in the US than any other natural disaster. For example, increased heat increases the chances of heat exhaustion and heat stroke, as high temperatures continue on into the night, a time period during which the body needs to rest and recover.
The recent wildfires in Southern California, brought air quality to extremely dangerous levels, making it unsafe to be outside. Additionally, heat increases the formation of ozone (smog) and hot roads cause more wear-and-tear on tires, which put more harmful particulate matter in the air. The increase in ozone and other pollutants in the air will cause health problems to the residents there, such as chest pain, coughing, throat irritation, and airway inflammation. In addition, these poor air quality conditions will be especially dangerous for those with asthma and allergies or those subject to cardiovascular and respiratory disease.
As wildfires have become more reoccurring in Southern California, fires threaten to get closer to East LA/Verdugos and cause more damage. If nothing is done to lower emissions, an average of 18.8 hectares are projected to burn per year between 2035-2064 in this area. East LA/Verdugos is at risk of losing up to 52.0 hectares in one year as a projected worst-case scenario. Between 2070-2099, an average of 18.4 hectares are projected to be burned per year with the projected worst-case scenario being 45.0 hectares burned overall.
With cool pavement and cool roofs installed in the region, we can reflect 20-60% of solar energy back into space, thereby cooling the area. Trees and shade cover can also bring surface temperatures down by up to 40 degrees. Tools like Treeviewer show how much tree coverage East LA/Verdugos has, as well as the potential for new trees. Currently, parts of East LA/Verdugos have up to 5% to 7% less tree coverage than the county average, showing that there is potential for new trees to cool the area and advance equity. By taking these steps, East LA/Verdugos will be better prepared for extreme heat days.
Through urban greening, air quality monitoring, and reducing pollution, East LA/Verdugos can transform its air quality. Tree canopy and ground-level vegetation absorb and disperse pollutants, and they can reduce heat at the same time. An air quality monitoring plan will keep track of the amount of pollutants in the region and allow people to take precautions like using pollution masks or avoiding outdoor activities. Lastly, by improving the accessibility of active and public transportation, we can address both air quality issues but also heat issues. For example, bus shelters can reduce heat and encourage bus ridership, thus addressing heat and air quality issues at the same time. Overall, these methods can lower the amount of cars and the pollutants produced from them, thereby improving air quality in East LA/Verdugos.
Clearing excess dry brush and plant life around homes can provide defensible space to prevent fires from spreading. An expert eye can also catch issues like ventilation systems that allow embers to enter a residence, and a need for nearby water sources. Tax increment finance or other measures can help fund these resources. For communities not immediately at risk of wildfire, the threat of wildfire smoke is still very real. Indoor air filtration systems, air quality monitoring programs, and access to pollution masks are all important measures to keep people safe.
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