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Policy Solution

Early-warning system

Awareness and Engagement


Communication systems issuing warnings about forecasted dangerous heat conditions have been shown to reduce mortality during extreme heat events.


Establish an extreme heat warning system with information about the duration and severity of the heat event as well as directing residents to cooling resources in the community.

Considerations for Use

Heat alerts should be disseminated through multiple channels such as social media, radio, television, text and phone call alerts to ensure the largest reach. The timing and resulting effectiveness of the first official announcement will establish a community’s level of trust in the system.


  • Climate:

    Cold, Hot/Dry, Hot/Humid, Temperate
  • Policy Levers:

    Awareness and EngagementGovernments may design and operate programs with the goal of increasing awareness and engagement among constituents or stakeholder groups about the risks and opportunities of extreme heat.
  • Trigger Points:

    No-regrets actions (low cost/low effort but substantial benefit)Interventions that are relatively low-cost and low effort (in terms of requisite dependencies) but have substantial environmental and/or social benefits.
  • Intervention Types:

  • Sectors:

    Disaster Risk Management, Informal Settlements, Public Health

Case Studies


  • Target Beneficiaries:

    Heat-vulnerable communities, Residents
  • Phase of Impact:

    Emergency response and management
  • Metrics:

    Number of community members reached


  • Intervention Scale:

    City, State/Province
  • Authority and Governance:

    City government, State/provincial government
  • Implementation Timeline:

    Short-term (1-2 Years)
  • Implementation Stakeholders:

    City government, State/provincial government
  • Funding Sources:

    Grants and philanthropy, Public investment
  • Capacity to Act:



  • Cost-Benefit:

  • Public Good:

  • GHG Reduction:

  • Co-benefits (Climate/Environmental):

    Provide flood protection
  • Co-benefits (Social/Economic):

    Build social cohesion, Improve human health