1001 Smart Cities

Permanent project revision

Miami-Dade's Chief Heat Officer and Extreme Heat Action Plan

Revision 2026-08-21-source-dates · effective 2026-07-26

Superseded. A later revision exists: 2026-08-22-cross-city-sourcing →

unreviewed

Record the publication date of each source that states one; a source that publishes no date is marked null, and one that shows only a revision carries `updated` instead.

sha256:9236c38c1d5814a1c4dfcd6c5e7b85bf369fa5f2222b783b27411a321a7e8278
All revisions → Current entity page →

Change set

  • replace /snapshot/projectFingerprint — Updated projectFingerprint to the current sourced project record.
  • replace /snapshot/sources — Updated sources to the current sourced project record.
9
of 9 claims mapped
9
source dossiers
5
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Claims, one by one

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-2fa0c1ae0a7ba4c7 quantitative
In 2021 Miami-Dade County created what it and its funder both call the world's first Chief Heat Officer, seeded by an Adrienne Arsht-Rockefeller Foundation challenge grant
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The county's own page states: 'In 2021, Miami-Dade County received a challenge grant offer from the Adrienne Arsht-Rockefeller Foundation Resilience Center to fast start an extreme heat initiative', leading to 'the world's first Chief Heat Officer (CHO)', responsible for 'improving coordination and accelerating existing heat protection efforts'.
Caveat
Both the county and its funder make the 'first' claim; no independent verification of the precedence was found, which is why the entry attributes it to them rather than asserting it. As of July 2026 the county page still describes the role in the present tense although the post has ended — it is not a status source.

Sources carrying this claim

  1. Miami-Dade County — Chief Heat Officer (authority)
  2. Arsht-Rock / Climate Resilience Center — Miami's Extreme Heat Action Plan (funder)
Claim 2 clm-1f11e074dfbc1c22 quantitative
The post produced a December 2022 Extreme Heat Action Plan
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The funder dates the plan to December 2022 and gives its three objectives: cooling neighbourhoods through green solutions such as increasing the tree canopy, increasing access to efficient and affordable cooling in homes and emergency facilities, and increasing outreach and education. It names a 30 per cent tree-canopy goal and projects heat-index days at or above 100°F rising from close to 50 in 2023 to 91 by 2053.
Caveat
Funder source, not independent.

Sources carrying this claim

  1. Arsht-Rock / Climate Resilience Center — Miami's Extreme Heat Action Plan (funder)
Claim 3 clm-cc43b97ca18afc14 quantitative
a May 1 to October 31 heat season with cooling sites in libraries and parks
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The county names the season verbatim — 'Heat Season protocol during the period of chronic high heat and humidity from May 1- Oct. 31' — and directs residents to 'visit a cooling site near you'.
Caveat
The page states no activation criteria: the cooling-site response is discretionary, not threshold-triggered. That distinction is what the entry's lesson turns on.

Sources carrying this claim

  1. Miami-Dade County — Extreme Heat / Weather Ready (authority)
Claim 4 clm-bcffdb4ef0de0ae2 quantitative
a National Weather Service pilot that lowered the county's heat-advisory threshold from a heat index of 108°F to 105°F for two hours
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
From June 1 the Heat Advisory threshold for Miami-Dade fell from a heat index of 108°F or higher for at least two hours to 105°F or higher for at least two hours, in a pilot run with the county and justified by local health data. Miami-Dade was the only area in the country given this pilot.
Caveat
Direct fetch returned an error during review; the text was confirmed via the search index and by the sibling Broward criteria page, which shows the criteria were later extended.

Sources carrying this claim

  1. NWS Miami — New Experimental Heat Advisory/Warning Criteria for Miami-Dade County (authority)
Claim 5 clm-704d7de6448e272a quantitative
Florida's HB 433 then barred counties from requiring heat protection for outdoor workers
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The law 'Prevents city and county governments from requiring that employers, including government contractors, provide heat protections for outdoor workers outside of those required under state or federal law', effective 1 July 2024 — and the direct local consequence: 'County commissioners in Miami-Dade withdrew their pending proposal to provide heat protections standards to outdoor workers in the county.'
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. KFF — Florida's heat-protection preemption law (independent policy research)
Claim 6 clm-1fd70319d22dacff quantitative
the county cut the officer post to help close a $400M budget gap
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The independent review states it directly: 'Miami-Dade County, which eliminated its Chief Heat Officer position as a part of an effort to close a $400 million funding gap that emerged in part as ARPA funds were exhausted.'
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Federation of American Scientists — Summer, Wrapped: The 2025 'State of the Heat' (independent)
Claim 7 clm-a53de6df004db796 descriptive
The heat season still runs; nobody holds the title
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
A June 2026 currency check shows the season protocol operating without an officer — a heat advisory in effect, a heat index of 105 to 110 degrees, and the Homeless Trust distributing water and directing unhoused people to cooling centres. Governing confirms the departure: 'Late last year, Gilbert left Miami-Dade to become chief heat ambassador with the Atlantic Council's Climate Resilience Center'.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. CBS Miami — heat advisory, 18 June 2026 (press)
  2. Governing — Protecting Miami From Extreme Heat (press, 2026)
Claim 8 clm-ec16c3eb4d8f1048 quantitative
Governing reported in 2026 that the plan's work included 1,700 air-conditioning units installed in public housing, hundreds of new shaded bus shelters and tens of thousands of trees planted, concentrated in low-income neighbourhoods
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The report carries the delivery figures: 'The county installed 1,700 air conditioning units in public housing', 'Tens of thousands of trees are being planted, particularly in low-income neighborhoods', and 'Hundreds of new bus shelters give transit riders a place to get out of the sun'.
Caveat
County-reported figures relayed by the press; no independent evaluation of the office or the plan was found. The same report cites research putting the county's true annual heat toll around 600 deaths, a contested figure the entry deliberately does not use because the same excess-mortality work produced both 34 and more than 600 depending on method.

Sources carrying this claim

  1. Governing — Protecting Miami From Extreme Heat (press, 2026)
Claim 9 clm-cd3ec2b2253a1277 descriptive
Miami-Dade lowered the temperature at which an alert fires, then the state removed its power to attach any obligation to that alert, and then the budget removed the post that had argued for both
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Three documented steps in sequence: the advisory threshold fell to a heat index of 105°F for two hours in a pilot unique to the county; HB 433 then barred city and county governments from requiring heat protections beyond state or federal law, and Miami-Dade withdrew its pending proposal; and the Chief Heat Officer post was eliminated to help close a $400 million gap.
Caveat
The causal reading that joins the three is the entry's own argument. None of the sources states that the budget cut followed from the preemption.

Sources carrying this claim

  1. NWS Miami — New Experimental Heat Advisory/Warning Criteria for Miami-Dade County (authority)
  2. KFF — Florida's heat-protection preemption law (independent policy research)
  3. Federation of American Scientists — Summer, Wrapped: The 2025 'State of the Heat' (independent)

Source dossiers and revision state

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-08-21-source-dates effective 2026-07-26 · created 2026-08-22

Awaiting operator and domain-expert review; publication of this revision implies neither.

sha256:9236c38c1d5814a1c4dfcd6c5e7b85bf369fa5f2222b783b27411a321a7e8278
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
9
of 9 claims mapped
9
source dossiers
5
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Miami-Dade County Chief Heat Officer, Office of Resilience (since reorganised as the Office of Environmental Risk and Resilience), with the Climate and Heat Health Task Force
Actor types
regional-government
Funding model
mixed
Funding description
Adrienne Arsht-Rockefeller Foundation Resilience Center challenge grant, then county general fund and ARPA money
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

9 source dossiers

Miami-Dade County — Chief Heat Officer (authority) miamidade.gov · 1 linked claim

Open original source ↗

Stable source ID
src-7bed012c9f9dd879
Publisher
Name not classified · miamidade.gov
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Operator source for origin and title: 'In 2021, Miami-Dade County received a challenge grant offer from the Adrienne Arsht-Rockefeller Foundation Resilience Center to fast start an extreme heat initiative', leading to 'the world's first Chief Heat Officer (CHO)'; the CHO is 'responsible for improving coordination and accelerating existing heat protection efforts'. Caution: as of July 2026 this page still describes the role in the present tense, although the post has ended — do not read it as a status source.

Descriptive only — not page/paragraph exact
Claims linked
Miami-Dade County — Extreme Heat / Weather Ready (authority) miamidade.gov · 1 linked claim

Open original source ↗

Stable source ID
src-e8629145ad43ba3a
Publisher
Name not classified · miamidade.gov
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The named season, verbatim: 'Heat Season protocol during the period of chronic high heat and humidity from May 1- Oct. 31'. Directs residents to 'visit a cooling site near you' but states no activation criteria — the cooling-site response is discretionary, not threshold-triggered. Also links county story maps on heat exposure and vulnerability, which did not render for review and are therefore not relied on here.

Descriptive only — not page/paragraph exact
Claims linked
NWS Miami — New Experimental Heat Advisory/Warning Criteria for Miami-Dade County (authority) weather.gov · 2 linked claims

Open original source ↗

Stable source ID
src-99c998993f414175
Publisher
Name not classified · weather.gov
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The one place a measured value has an automatic consequence: from June 1 the Heat Advisory threshold for Miami-Dade fell from a heat index of 108°F or higher for at least 2 hours to 105°F or higher for at least 2 hours, in a pilot run with the county and justified by local health data; Miami-Dade was the only area in the country given this pilot. Direct fetch returned 404 during review; text confirmed via the search index and by the sibling page HeatCriteriaChangeBroward2024, which shows the criteria were later extended.

Descriptive only — not page/paragraph exact
Claims linked
Arsht-Rock / Climate Resilience Center — Miami's Extreme Heat Action Plan (funder) onebillionresilient.org · 2 linked claims

Open original source ↗

Stable source ID
src-8cdb2bfe04547683
Publisher
Name not classified · onebillionresilient.org
Type / language
web-page · language not classified
Published
2022-12-14
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Dates the plan to December 2022 and gives its three objectives: cool neighbourhoods through green solutions such as increasing the tree canopy, increase access to efficient and affordable cooling in homes and emergency facilities, and increase outreach and education. Names a 30 percent tree-canopy goal and projects heat-index days at or above 100°F rising from close to 50 in 2023 to 91 by 2053. Funder source, not independent.

Descriptive only — not page/paragraph exact
Claims linked
KFF — Florida's heat-protection preemption law (independent policy research) kff.org · 2 linked claims

Open original source ↗

Stable source ID
src-bd19d50d4a84fcc8
Publisher
Name not classified · kff.org
Type / language
web-page · language not classified
Published
2024-04-26
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The hard legal limit, verbatim: HB 433 'Prevents city and county governments from requiring that employers, including government contractors, provide heat protections for outdoor workers outside of those required under state or federal law', effective July 1, 2024. And the direct local consequence: 'County commissioners in Miami-Dade withdrew their pending proposal to provide heat protections standards to outdoor workers in the county.'

Descriptive only — not page/paragraph exact
Claims linked
Federation of American Scientists — Summer, Wrapped: The 2025 'State of the Heat' (independent) fas.org · 2 linked claims

Open original source ↗

Stable source ID
src-af34b7f9202a7546
Publisher
Name not classified · fas.org
Type / language
web-page · language not classified
Published
2025-10-15
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The status-changing sentence, verbatim: 'Miami-Dade County, which eliminated its Chief Heat Officer position as a part of an effort to close a $400 million funding gap that emerged in part as ARPA funds were exhausted.'

Descriptive only — not page/paragraph exact
Claims linked
Governing — Protecting Miami From Extreme Heat (press, 2026) governing.com · 2 linked claims

Open original source ↗

Stable source ID
src-3ba0dae145ab5e55
Publisher
Name not classified · governing.com
Type / language
web-page · language not classified
Published
2026-05-29
Updated
2026-06-02
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Confirms the departure — 'Late last year, Gilbert left Miami-Dade to become chief heat ambassador with the Atlantic Council's Climate Resilience Center' — and carries the delivery figures: 'The county installed 1,700 air conditioning units in public housing', 'Tens of thousands of trees are being planted, particularly in low-income neighborhoods', 'Hundreds of new bus shelters give transit riders a place to get out of the sun'. Also reports research putting the county's true annual heat toll around 600 deaths, far above the recorded count — that figure is contested and is not used in this entry, because the same excess-mortality work produced both 34 and more than 600 depending on method.

Descriptive only — not page/paragraph exact
Claims linked
Miami-Dade County — Climate and Heat Health Task Force (authority) miamidade.gov · background

Open original source ↗

Stable source ID
src-a9dee4ba570128d8
Publisher
Name not classified · miamidade.gov
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The governance layer around the post: the task force was to 'prioritize short-term actions, create a framework for prioritizing future actions and for monitoring progress, and recommend staffing', across four objectives — employer and public heat education, emergency-management and healthcare capacity, affordable efficient air-conditioning through weatherization, and heat in streetscape and parks design. Recommendations only; no mandatory instrument.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
CBS Miami — heat advisory, 18 June 2026 (press) cbsnews.com · 1 linked claim

Open original source ↗

Stable source ID
src-1467ee060dabdb86
Publisher
Name not classified · cbsnews.com
Type / language
web-page · language not classified
Published
2026-06-18
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Currency check: the season protocol still operates without an officer. 'With a heat advisory in effect for most of the day', 'heat index reaches 105 to 110 degrees', and the Miami-Dade Homeless Trust distributing water and directing unhoused people to cooling centres.

Descriptive only — not page/paragraph exact
Claims linked
Known limits of this passport
  • Publisher names and source languages have not yet been classified; domains are recorded without guessing.
  • Existing source notes are descriptive locators, not page- or paragraph-exact citations.
  • A missing archive, publication date or content hash is shown as null rather than inferred.
  • The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.