The goal of this clinical trial is to learn if an innovative online decision support tool (Chart) that provides localized health risk assessment for extreme heat at the census tract level helps local health departments plan and prepare for extreme heat by identifying risk drivers in their jurisdictions, highlighting interventions that are effective for their jurisdiction's risk profile, and providing information regarding intervention implementation. This trial will evaluate barriers and facilitators of the tool's implementation. The main questions it aims to answer are: 1. Does a health department using the tool have better reach, effectiveness, adoption, implementation, and maintenance of heat-health activities compared with an information-only control? 2. What are the barriers and facilitators of Chart's implementation? Researchers will compare health departments using Chart to health departments using provided heat-health information only.
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Baseline assessment: demographics
Timeframe: Baseline
Baseline assessment: current activities
Timeframe: Baseline
Baseline assessment: implementation factors
Timeframe: Baseline
Post-intervention survey: demographics
Timeframe: Eight months after the intervention begins.
Post-intervention survey: activities
Timeframe: Eight months after the intervention begins.