Tag Archives: health

Los Angeles Urban Cooling Collaborative

Helping to Demonstrate the Benefits of a Cooler Los Angeles as a Model for Other Cities

The Los Angeles Urban Cooling Collaborative (LAUCC) is a unique national partnership between nonprofit groups, universities, government agencies and other experts in urban heat with the aim of achieving a cooler, more prosperous, and healthier Los Angeles by addressing current and future challenges posed by urban heat. By mid-century, average temperatures in Los Angeles are expected to rise by 3 to 7°F. Heat stress driven by this kind of warming is associated with many negative health outcomes, including premature death, which is expected to become more common as the planet continues to warm. These effects are particularly pronounced in highly urbanized areas like Los Angeles.


The LAUCC brings together policy and implementation experts, world-class research institutions and others to empower communities, city officials, and other key stakeholders to act on the urgency and realize the full value of robust planning today for a cooler city tomorrow.

The LAUCC Strategy

To realize the opportunities of a cooler Los Angeles, LAUCC will:

  1. Quantify the health impacts of installing reflective roofs and vegetation at the neighborhood level with original research.
  2. Demonstrate the real-world impact of these strategies in select Los Angeles communities.  Deliverable: Community-scale demonstration projects in one to three neighborhoods.
  3. Leverage existing relationships with city officials and other stakeholders to ensure that these cool strategies are prioritized in city and utility policymaking.

This cutting-edge research will produce a framework that will be shared nationally with decision makers and stakeholders, community health organizations, NGOs, and urban forestry groups.
LAUCC is seeking funding and  partners interested in tackling the challenge of urban heat and create a climate-resilient Los Angeles. Please contact Kurt Shickman (kurt at globalcoolcities.org) if you are interested in learning more!

Partners include:


Assessing the Health Impacts of Urban Heat Island Strategies in the District of Columbia

The District of Columbia is susceptible to extreme heat events whose health impacts are exacerbated by the fact that the city is often significantly warmer than surrounding rural areas during the summer. The study found that a 10-percentage point increase in urban surface reflectivity could reduce the number of deaths during heat events by an average of 6%. Adding a 10% increase vegetative cover to the increases in reflectivity yielded an average 7% reduction in mortality during heat events. During the decades between 1948 and 2011, an average of 285 people died of heat-related causes. A 6-7% decrease in mortality would save approximately 20 lives per decade. In addition, an even larger reduction would be expected in hospital admissions from heat-related illness, although this was not a specific finding of this analysis. Changes in temperature and humidity (as measured by dew point temperature) in both scenarios were relatively minor, yet were significant enough to contribute to the reduction of deaths.

The District, given its current policy landscape and development, could achieve the increases in reflectivity and vegetation used in this study. Increasing District-wide roof reflectivity by 10 percentage points is achievable by converting dark grey roofs to white roofs on approximately 25 percent of the District’s buildings. Assuming the average roof lasts 20 years, the District could achieve this with end-of-life roof replacements in slightly more than 5 years. Achieving the same increase in reflectivity for pavements would require the conversion of 50 percent of District pavements from dark asphalt to a slightly lighter option like grey concrete. A significantly smaller percentage of pavements would need to be converted if cool coatings were applied where feasible.

Get the full study on our Cool Roofs and Cool Pavements ToolKit here.