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The frequency of hot and dry conditions in the County is projected to increase, making certain areas more prone to wildfire. Fire seasons are projected to begin earlier and last longer due to this change in weather patterns, increasing the threat wildfire hazard poses to the County.

Potential Physical Interventions

Click on any strategy below for more detailed descriptions. 

Urban Forest

Urban forests are planted tree communities of native or ecologically suited trees throughout cities that reduce urban heat and flooding risks, among other benefits.

Retention/Detention Ponds

Retention or detention ponds are depressions at the end of a slope that retain and detain water depending on conditions, reducing flooding impacts.

Increasing River Floodplain

Increasing riverine floodplains refers to restructuring river banks to their more natural form in order to mitigate flooding.

Rain Garden

Rain gardens are shallow to deep depressions filled with flood resistant, native plants that detain, slow, and filter stormwater runoff.

Constructed Inland Wetlands

Constructing or restoring wetlands aims to recreate natural wetlands in an urban environment, which provides flood mitigation and water purification.

Creek Daylighting

Daylighting refers to removing obstructions from rivers, streams, and creeks to allow water to flow naturally, creating greater storage capacity during flooding events.

Stormwater Tree Pits

A stormwater tree pit is dug into the sidewalk adjacent to a street and a tree is planted to absorb and filter storm runoff and flooding.


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Coyote Valley Preservation

In November 2019, 937 acres in Coyote Valley were permanently protected through an innovative public and private partnership among Peninsula Open Space Trust (POST), Santa Clara Valley Open Space Authority (OSA) and the City of San José. The $93.46 million acquisition deal was funded in part by Measure T, a $650 million infrastructure bond approved by San José voters in November 2018

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Street Edge Alternatives (SEA) Street Pilot

Seattle Public Utilities reconstructed an entire city street to include green infrastructure throughout. The infrastructure included bioswales, tree canopies, pervious pavement and more.

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Cathedral Park Rain Garden

Portland's Biggest Rain Garden: Portland, Oregon has redeveloped their city to include a multitude of nature based solutions on large scales. One of their most successful implementations was developing 3,600 rain gardens throughout the city. Cathedral Park houses Portland's biggest rain garden.

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California Academy of Sciences Living Roof

The Living Roof in San Francisco offers incredible insulation for the Academy of Sciences while simultaneously offering essential habitat for birds and insects and creating educational spaces.

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San Francisco Urban Forestry Plan

The goals of the SF Urban Forest Plan is to plant 50,000 new trees by 2050, create a city wide street tree maintenance program, and to educate the public on the importance and brilliance of trees.

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Happy Valley Bioswale

The Happy Valley Bioswale in Ventura, CA is a massive example of what bioswales can achieve. The bioswale, 300 ft long in a horse shoe orientation, treats water runoff from 36 acres of the surrounding urban environment.

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Moffett Park Specific Plan Urban Ecology

The Moffett Park Technical Plan lays out a city wide redevelopment of green infrastructure and Nature-Based Strategies that create habitats and natural corridors in order to reduce climate impacts and positively impact the community.

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Seattle Urban Forest Plan

Seattle Urban Forestry plan implemented the planting of trees and understory plants, as well as public gardens with agriculture across the city. The increase of vegetation has reduced noise and air pollution, while reducing flooding across the city.

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