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a b s t r a c tThree hundred and fifty municipalities across five continents participated in the Urban Climate Change Governance Survey (UCGS). Conducted at MIT in partnership with ICLEI -Local Governments for Sustainability, the UCGS provides a first of its kind look at the governance networks that municipalities are creating to address climate change.Drawing from these results, this paper analyses the institutional governance structures that surround local government work on climate change adaptation. Results show an integration of adaptation and mitigation planning, and a mainstreaming of adaptation planning into other long-range and sectoral plans. Seventy-three percent of respondents stated that their local government's are engaging with both adaptation and mitigation, and 75% are integrating adaptation into long-range or sectoral plans. However, many critical municipal agencies -including those responsible for water, waste water, health, and building codes -remain on the margins of urban adaptation efforts.Internal institutional networks of governance are inextricably linked to efforts to address a problem like adaptation, which does not fit neatly into individual institutional silos. The results of the UCGS show where these networks have so far been made, how they have been created, and which local government actors have yet to be effectively engaged. Ó

The past two decades have seen an impressive expansion of municipal engagement with climate change. Yet while interest has broadened, actions remain shallow. This is in part because climate policies fit uneasily into existing bureaucratic structures and practices. Effective climate programmes require adaptive and innovative responses that span departmental divisions. This challenges siloised municipal offices that are embedded in their own organisational cultures and technical practices. Understanding those challenges is crucial to understanding urban responses to climate change, but they remain critically understudied. This paper helps to fill that gap by looking at the experiences of two cities, Durban (KZN, South Africa) and Portland (OR, USA) as they attempt to put in place integrated responses to climate change. To do so, it brings together complementary critical perspectives drawn from the study of bureaucracies and complex institutions in sociology and geography. This hybrid critical framework is used to elaborate on both the organisational barriers that inhibit effective responses to climate change, and approaches that can be used to enable change and innovation.

With this paper I investigate the role of civil society groups in speeding the urban adoption of green technologies (in particular, renewable energy systems) by creating economic niches, and catalyzing market transformations. I focus on a qualitative case study of Solarize Portland, a community-managed solar energy program that has transformed the local and regional market for solar energy in Portland, OR. This case study is analyzed through the lens of recent theories of public participation that emphasize the multiplicity and complexity of participatory processes in practice. I conclude that-thanks to their flexibility, risk tolerance, and locally embedded understanding of technological change-civil society groups have the capacity to design and implement significant urban sustainability projects. They achieve this by creating niches within the urban landscape that allow local small and medium-sized enterprises to develop and refine their businesses practices; by coordinating novel partnerships between state, community, and private-level actors; and by grounding technological change in the broader social networks that give them meaning and momentum. These findings speak directly to the way that cities approach the complex sociotechnical transitions involved in reshaping urban infrastructure to respond to the challenge of climate change.

It has become increasingly clear that cities will have to simultaneously undertake both adaptation and mitigation in response to accelerating climate change and the growing demands for meaningful climate action. Here we examine the connections between climate mitigation and climate adaptation, specifically, between low‐carbon energy systems and extreme events. The article specifically addresses the question, how do responses to extreme climate risks enhance or limit capacity to promote city‐level greenhouse gas (GHG) mitigation? As a step toward answering this question, we present a framework for considering windows of opportunity that may arise as a result of extreme events and how these windows can be exploited to foster development and implementation of low‐carbon energy strategies. Four brief case studies are used to provide empirical background and determine the impact of potential windows of opportunity. Some general conclusions are defined. In particular, the existing energy system structure is an important determinant of impact and potential for energy transitions. Well‐developed and articulated governance strategies and ready access of effective and economically efficient alternative energy technology were key to transitions. However, prospects for inequity in development and implementation of low‐carbon solutions need to be considered. Finally, exploiting windows of opportunity afforded by extreme events for developing low‐carbon economy and infrastructure also can provide resilience against those very events. These types of responses will be needed as extreme events increase in frequency and magnitude in the future, with cities as primary sites of impact and action. This article is categorized under: Vulnerability and Adaptation to Climate Change > Learning from Cases and Analogies