“The City has begun its Climate Adaptation planning process in 2020 and this work will establish further deadlines. Certain adaptation measures are already underway and will continue such as OOS’s heat resilience work. The City is currently exploring adaptation pathways and determining the costs of planning and actions related to these pathways.”
PHILADELPHIA CLIMATE ACTION PLAYBOOK, January 2021, page 38.
As part of our effort to raise awareness of the need to improve our home resilience and to educate homeowners in the U.S on solutions to climate risks, we gather information on resilient actions, strategies, and challenges from key cities in the U.S.
In this blog, we focus on the city of Philadelphia, Pennsylvania, and its climate resilience. Philadelphia is the largest city in Pennsylvania. It is located on the fall line between the flat Atlantic coastal plain and the Piedmont plateau region and has a “mixed humid” climate: the summers are hot and humid, while winters get cold.
Cheyenne Flores, a Community resilience specialist in the city of Philadelphia helped to lay out the aspirations, challenges, and efforts that the city undertakes to adapt to a changing climate.
Risks
In recent years, residents of Philadelphia are experiencing worse storms, heavier precipitation, and higher temperatures than the historical average.
In September 2021 Philadelphia was impacted by Hurricane Ida and two weeks after the storm subsided, the City was still managing its damage and historic flooding impacts.
According to a report based on the 5th assessment of the Intergovernmental Panel of Climate Change (IPCC) from 2014, Philadelphia is expected to face a warmer and wetter future across all scenarios for the near-term and mid-century time periods compared to historical observations. Average annual temperatures and annual precipitation in Philadelphia are projected to increase for all time periods.
The city acknowledges the projections of future climate vs. Philadelphia climate today, and is preparing for a hotter and wetter future.
The City’s Climate Resilient Actions
The Office of Sustainability works in collaboration with other City agencies, community members, universities, institutions, and organizations to promote climate resilience through different strategies.
The City recognizes that sustainability comprises both mitigation and adaptation of climate change. Therefore, the City’s efforts towards greening are a pathway towards resilience as well. For example, increasing the tree canopy in Philly contributes to climate mitigation by absorbing carbon emissions and reducing the environmental impact. It has also been shown to decrease temperatures by providing shade and evapotranspiration, and decrease flooding by allowing floodwater to easily infiltrate the ground, contributing to climate adaptation.
The city is facing ongoing challenges of insufficient funds and cross-sectoral collaboration, which are vital for implementing climate resilience solutions and their success. Yet, Philadelphia is working on several sustainable and climate-resilient projects:
Promoted Home Resilience Strategies
Philadelphia Parks & Recreation and Fairmount Park Conservancy run the TreePhilly program. This initiative promotes residents to plant and care for trees. Each fall communities in different parts of the city host “community yard tree giveaways”, in which everyone with a yard on their property can get a free tree. Residents who don’t have a yard can request a street tree for the front of their property. The program also provides information on tree maintenance, and by request, provides a list of certified Arborists approved by Philadelphia Parks & Rec.
As of Spring of 2022, this initiative is responsible for providing more than 21,500 trees.
Greenworks Guide
The Office of Sustainability developed a Greenworks guide to help individual residents practice sustainability, safety, comfort, and climate resilience in their homes. The guide provides recommendations regarding water usage, improving air quality, increasing energy efficiency, and climate preparedness. It includes specific recommendations for climate resilient homes such as:
Beat the Heat
Through the mentioned Beat the Heat Hunting Park project, the city promotes additional heat resilience solutions such as:
Insurance
The city recommends considering purchasing flood insurance through the National Flood Insurance Program (NFIP). Damage from merely a few inches of flood can cost more than $10,000 for a 1,000-square foot home, a cost that is not covered under a homeowner’s policy.
Backwater Protection
The city promotes installing backwater valves with the Basement Backup Protection Program. Backwater valves can prevent wastewater from backing up through the pipes during extreme precipitation and flooding.
Stormwater Management
Through a Rain Check Program, the Philadelphia Water Department (PWD) urges residents to help manage stormwater runoff. The PWD specifies strategies that hold an important role in capturing stormwater. Uncaptured stormwater could otherwise add to sewer overflows and damage Philadelphia’s rivers:
Incentives:
Professionals:
Building Codes
In 2019, Philadelphia adopted the "2018 International Building Code" as published by the International Code Council (ICC), with state and local amendments for commercial buildings. The city also adopted the 2015 International residential building code. Both codes include resilience as well as energy efficiency upgrades.
In May 2010, Mayor Nutter, then-Mayor of Pennsylvania, signed legislation requiring new construction in the city to use highly reflective roofing materials that meet or exceed Energy Star cool roof standards. The Cool Roof Law that was passed by the City Council was the first step toward Philadelphia's anticipated adoption of green building standards. The regulation requires new and renovated roofs to be designed as cool roofs.
The Philadelphia Water Department (PWD) developed local Stormwater Regulations in accordance with Philadelphia Code §14-704(3), which consist of four major Post-Construction Stormwater Management Requirements: Water Quality, Channel Protection, Flood Control, and Public Health and Safety Release Rate.
The City continues to work on adopting the most up-to-date codes under the State’s regulations and working on developing policies for building developers to better prepare buildings for floodplains and extreme heat.
Education/Communication
Here are ways for homeowners to be educated on the city’s climate risks, strategies, and incentives:
As mentioned in the introduction of this blog, Philadelphia set new resilience goals in 2020, some of them are in motion and some are forthcoming, for the list of initiatives see PHILADELPHIA CLIMATE ACTION PLAYBOOK.
Final thoughts
Philadelphia aligns with our definition of “sustainability” as being both green and resilient. The city’s actions aim to both mitigate and adapt to climate change.
Through action, Philly proves that solutions sometimes emerge from communities when they are engaged in climate-resilient projects in a fun and motivational form. The city aggregates its climate mitigation and adaptation actions in a fun and engaging report named: “Climate Action Playbook”.
Of the climate risks that Philly is exposed to, the focus is clearly on the excessive heat and flooding. Other than initiating important projects such as managing stormwater runoff, there is an ongoing effort to educate the residents on how to protect themselves, the community, and the city. This is done by initiating projects and providing resources and incentives. Specifically, there is an extensive effort to manage stormwater runoff to protect Philly’s water. The water department engages residents as well as professionals to help tackle this risk.
Finally, what can residents do to improve the resilience of their homes, communities, and their city?
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