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Implementation Science at UW

Keywords: Jeremy Hess

✪ Pilot randomized controlled trial to assess the effectiveness of a heat risk reduction decision support platform and barriers and facilitators of its implementation

Authors:

Jeremy Hess, Marci Burden, Tania M. Busch Isaksen, Kristie L. Ebi, Nicole A. Errett, Chelsea Gridley-Smith, C. Bradley Kramer, Clare McCarthy, Oma McLaughlin, Resham Patel, Anna Reed, Mary Hannah Smith, Stefan Wheat & Kenneth Sherr

University of Washington affiliated authors are displayed in bold.

✪ Open Access

Published: November 2025

Read the full text in the open access journal Implementation Science Communications

Abstract:

Background

Climate-sensitive hazards such as extreme heat are increasing in frequency and severity. Protecting population health requires hazard-specific risk assessment, selection of potential interventions, and support for intervention implementation. This process typically takes several years, constraining health adaptation to climate-sensitive hazards. The investigators have developed an online decision support platform, CHaRT, that links evidence-based, location-specific heat-health risk assessment with transparent analyses of risk drivers and evidence-based risk reduction guidance for use in local health departments (LHDs). CHaRT’s effectiveness in supporting delivery of effective health interventions has not been evaluated.

Methods

LHDs are the organizational unit being studied. In this pilot randomized controlled trial, LHDs from the conterminous US will be recruited in coordination with the National Association of City and County Health Officials (NACCHO). Thirty LHDs will be selected at random from interested participants. Fifteen will be randomized to receive the intervention, a facilitated engagement with CHaRT, and 15 will receive the control, a package with information on heat vulnerability assessment and potential interventions. Intervention and control packages will be delivered simultaneously. Facilitated engagement will include an introduction to the tool, user exploration of the tool, elective inclusion of site-specific data into the tool, follow-up sessions to address additional questions, and discussion with investigators regarding planning and implementation needs. Pre- and post-study surveys will be used to assess CHaRT’s effectiveness using the RE-AIM (Reach, Effectiveness, Acceptability, Implementation, Maintenance) framework and by comparing each site’s intentions to implement specific interventions. After the trial, barriers and facilitators of the CHaRT platform’s implementation will be assessed through key informant interviews with the intervention group and analyzed using the Consolidated Framework for Implementation Research (CFIR).

Discussion

This study will allow investigators to evaluate the public health impact of a decision support platform and to identify barriers and facilitators of its implementation. The results will guide future research into strategies for increasing public health adaptation to climate change at the speed and breadth required.

**This abstract is posted with permission under the Creative Commons Attribution 4.0 International License**

✪ Lessons learnt from the 2021 Pacific Northwest heat dome: a qualitative study of western Washington’s healthcare community response

Authors:

Matias Korfmacher, Cat Hartwell, Kelly Hill, Nathaniel Matthews-Trigg, Jeremy Hess, Amruta Nori-Sarma, & Gregory Wellenius

University of Washington affiliated authors are displayed in bold.

✪ Open Access

Published: April 2025

Read the full text in the open access journal BMJ Open

Abstract:

Objective

The 2021 Pacific Northwest heat dome was Washington state’s deadliest recorded weather event and presented unprecedented response challenges to the state’s health sector. Understanding the impacts of this extreme heat event (EHE) on the sector as well as the barriers to and facilitators of implementing effective heat response is critical to preparing for future events, which are happening more frequently in the region due to climate change.

Design

Guided by an implementation science framework, we convened listening sessions and focus groups of the health sector in western Washington to reflect on regional response efforts.

Setting

Health sector organisations in 15 counties in western Washington State, USA: Clallam, Grays Harbor, Island, Jefferson, King, Kitsap, Lewis, Mason, Pacific, Pierce, San Juan, Skagit, Snohomish, Thurston and Whatcom.

Participants

A convenience sample of 109 listening group participants was recruited through the professional networks of the Northwest Healthcare Response Network, a regional healthcare coalition. 27 of the health sector professionals were recruited using purposive sampling to participate in seven focus groups organised by organisation type.

Results

The co-presence of the COVID-19 pandemic, limited staff capacity, resource acquisition challenges and inadequate regional collaboration emerged as key barriers, while advanced planning, indoor cooling capabilities, adapting strategies to local needs, robust internal relationships and strong external partnerships were reported to facilitate effective response. Establishing centralised coordination ahead of heat events, making improvements to the cooling capabilities of the built environment, developing plans and policies for EHEs that have co-benefits for other events, adopting evidence-informed response strategies, institutionalising the knowledge and relationships developed through prior events and improving evaluative processes (such as developing real-time monitoring capacity) will enable more effective response to future EHEs.

Conclusions

Western Washington’s health sector implemented EHE response activities that enabled essential service continuity, despite limited resources, unfamiliarity with EHEs and other systemic challenges. The recency of the heat dome presents an opportunity to incorporate lessons learnt into practice, policies, plans and built environment; these are necessary improvements ahead of future large-scale events the region may experience in the coming decades.

**This abstract is posted with permission under the Creative Commons Attribution 4.0 International License**