Sidewalks, Shade, and the Silent Killer in Sunnyvale

By Franklin Everett Shaw

March 18, 2026

Imagine walking down Murphy Avenue in Sunnyvale on a scorching summer afternoon. The sun beats down relentlessly, reflecting off the concrete sidewalks. There’s barely a tree in sight, offering no respite from the intense heat and UV radiation. This isn’t just uncomfortable; it’s a public health crisis waiting to happen.

Sunnyvale, California, a city known for its tech industry and innovation, is surprisingly lacking in adequate shade on its sidewalks. This deficiency directly contributes to an increased risk of skin cancer for pedestrians, a problem that demands immediate attention and action. We need to talk about the sun, the sidewalks, and the serious health risks Sunnyvale residents face every day.

The link between sun exposure and skin cancer is undeniable. Prolonged exposure to ultraviolet (UV) radiation from the sun damages skin cells, leading to mutations that can cause cancer. Walking, a healthy and sustainable mode of transportation, becomes a risky activity when sidewalks offer no protection from the sun’s harmful rays.

Consider this: a fair-skinned individual can experience sunburn in as little as 15 minutes on a sunny day in Sunnyvale during peak hours. Repeated sunburns significantly increase the risk of developing melanoma, the deadliest form of skin cancer. This isn’t just a theoretical concern; it’s a real and present danger for Sunnyvale residents, especially those who walk regularly for commuting, exercise, or errands.

So, what can be done? The solution lies in a multi-pronged approach that combines individual sun-safe practices with systemic changes in city planning.

First, let’s address individual responsibility. Sun-safe walking practices are crucial for mitigating the risk of skin cancer.

• Wear Sunscreen: Apply a broad-spectrum sunscreen with an SPF of 30 or higher to all exposed skin, even on cloudy days. Reapply every two hours, or more frequently if sweating or swimming. Don’t forget often-missed areas like the ears, neck, and back of hands.
• Wear Protective Clothing: Opt for long sleeves, pants, and wide-brimmed hats to shield your skin from the sun. Darker colors generally offer more protection than lighter colors.
• Seek Shade: Whenever possible, walk on the shady side of the street or take routes that offer natural shade from trees or buildings.
• Wear Sunglasses: Protect your eyes from UV radiation by wearing sunglasses that block 99-100% of UVA and UVB rays.
• Time Your Walks: Avoid walking during peak sun hours, typically between 10 a.m. and 4 p.m. Schedule your walks for early morning or late afternoon when the sun’s rays are less intense.

These practices are essential, but they are not enough. Relying solely on individual responsibility places an unfair burden on residents and ignores the systemic problem of inadequate shade infrastructure. Sunnyvale needs to prioritize the creation of more shade on its sidewalks through strategic urban planning.

This is where the city of Sunnyvale needs to step up. The city’s planning department should implement policies that prioritize shade provision in all new development projects and retrofit existing sidewalks with shade-producing infrastructure.

Here are some concrete steps the city can take:

• Plant More Trees: A comprehensive tree planting program is essential. Select tree species that provide dense shade and are well-suited to the local climate. Consider planting trees along sidewalks, in parks, and in other public spaces. Focus on native California species that require less water and are more resilient to drought conditions.
• Install Shade Structures: In areas where tree planting is not feasible, consider installing shade structures such as awnings, pergolas, or shade sails. These structures can provide immediate relief from the sun and create more comfortable walking environments.
• Incorporate Shade into Building Design: Encourage or require new buildings to incorporate shade-producing elements into their design, such as overhangs, balconies, and strategically placed windows.
• Develop a Shade Master Plan: Create a comprehensive plan that identifies areas with the greatest need for shade and outlines strategies for addressing these needs. This plan should be based on data analysis, community input, and best practices in urban forestry and shade design.
• Revise Zoning Regulations: Update zoning regulations to require or incentivize shade provision in new development projects. This could include requirements for minimum tree canopy cover, shade structure installation, or building design features that provide shade.

One common pitfall is the selection of inappropriate tree species. Some trees may be aesthetically pleasing but provide little shade or require excessive maintenance. It’s crucial to choose trees that are well-suited to the local climate, provide dense shade, and require minimal pruning. Another challenge is the cost of implementing these changes. However, the long-term benefits of reduced skin cancer rates and improved public health far outweigh the initial investment.

Consider the example of Tempe, Arizona. Faced with similar challenges of extreme heat and sun exposure, Tempe implemented a comprehensive shade master plan that included planting thousands of trees, installing shade structures, and revising zoning regulations to prioritize shade provision. As a result, Tempe has significantly improved the walkability and livability of its downtown area and reduced the risk of heat-related illnesses and skin cancer.

Sunnyvale can learn from Tempe’s success and adapt its strategies to the local context. This requires a commitment from city officials, collaboration with community organizations, and active participation from residents.

For Sunnyvale residents who want to get involved, here are some resources:

• Attend City Council Meetings: Voice your concerns about the lack of shade on sidewalks and advocate for policy changes.
• Join Local Advocacy Groups: Connect with organizations that are working to improve public health and environmental sustainability in Sunnyvale.
• Contact Your Elected Officials: Reach out to your city council members and state representatives to express your support for shade-producing infrastructure.
• Participate in Community Events: Attend community events and workshops to learn more about skin cancer prevention and advocate for sun-safe practices.
• Schedule a Skin Cancer Screening: Regular skin cancer screenings are essential for early detection and treatment. Contact your doctor or a local dermatology clinic to schedule an appointment. The American Academy of Dermatology offers free skin cancer screenings in many locations.

The lack of shade on Sunnyvale sidewalks is a serious public health issue that demands immediate attention. By combining individual sun-safe practices with systemic changes in city planning, we can create a more walkable, livable, and healthy community for all Sunnyvale residents. Let’s work together to make Sunnyvale a city where walking is not a health risk, but a healthy and enjoyable activity. The time for action is now.