NightBreath

Heat Justice Observatory

CCM 2026 Hackathon Submission

NightBreath

The heat does not leave when the sun does. In Toronto, minimum nighttime temperatures are rising faster than daytime highs. The body loses recovery windows, and mortality concentrates where cooling access has always been unequal.

Night Warming

-0.30C/decade

Day Warming

+0.57C/decade

Night Acceleration

-0.53x

2024 Nights above 25C

0

Global Climate Events Right Now

NASA EONET open events streamed every five minutes while this page is open.

Wildfiresrx-66 Prescribed Fire, Burnett, WisconsinWildfiresBauman Wildfire, Jackson, South DakotaWildfiresBaldwin Fuels 6 RX Prescribed Fire, Lake, MichiganWildfiresPeterson Wildfire, Holt, NebraskaWildfiresAndrews Wildfire, Cherry, NebraskaWildfiresHammer Wildfire, El Paso, ColoradoWildfiresTaber Rec Wildfire, Bon Homme, South DakotaWildfiresPressey Wildfire, Cherry, NebraskaWildfiresLone Pine Wildfire, Becker, MinnesotaWildfiresWells Rd Unit 1 RX Prescribed Fire, Iosco, MichiganWildfiresCOW CREEK Wildfire, Levy, FloridaWildfiresrx-73 Prescribed Fire, Burnett, WisconsinWildfiresrx-66 Prescribed Fire, Burnett, WisconsinWildfiresBauman Wildfire, Jackson, South DakotaWildfiresBaldwin Fuels 6 RX Prescribed Fire, Lake, MichiganWildfiresPeterson Wildfire, Holt, NebraskaWildfiresAndrews Wildfire, Cherry, NebraskaWildfiresHammer Wildfire, El Paso, ColoradoWildfiresTaber Rec Wildfire, Bon Homme, South DakotaWildfiresPressey Wildfire, Cherry, NebraskaWildfiresLone Pine Wildfire, Becker, MinnesotaWildfiresWells Rd Unit 1 RX Prescribed Fire, Iosco, MichiganWildfiresCOW CREEK Wildfire, Levy, FloridaWildfiresrx-73 Prescribed Fire, Burnett, Wisconsin
rx-66 Prescribed Fire, Burnett, WisconsinApr 23, 14:23 UTC
Bauman Wildfire, Jackson, South DakotaApr 23, 12:13 UTC
Baldwin Fuels 6 RX Prescribed Fire, Lake, MichiganApr 23, 11:03 UTC
Peterson Wildfire, Holt, NebraskaApr 23, 09:06 UTC
Andrews Wildfire, Cherry, NebraskaApr 22, 21:43 UTC
Hammer Wildfire, El Paso, ColoradoApr 22, 21:07 UTC

Cooling Justice Roadmap

A staged intervention stack from mutual aid this week to infrastructure shifts over years.

Now

Cost $

Heat Night Mutual Aid Circles

Reduces isolated deaths by pairing high-risk residents with nightly check-ins.

Equity lens: Prioritize seniors, dialysis patients, and low-income towers without cooling.

Now

Cost $$

Night Bus Cooling Loops

Creates mobile overnight cooling shelters in transit deserts.

Equity lens: Deploy first to historically redlined tracts with low AC ownership.

This Season

Cost $$

Targeted Cool Roof Blitz

Rapidly lowers indoor overnight temperatures in hottest blocks.

Equity lens: Bundle grants for non-profit and rent-geared buildings before private stock.

This Season

Cost $$

Tree Canopy Night Corridors

Builds shaded cooling corridors linking homes to transit and clinics.

Equity lens: Use canopy deficit maps, not political boundaries, for placement.

1-3 Years

Cost $$$

Radiative Pavement Retrofits

Cuts nighttime heat release from asphalt-dominant corridors.

Equity lens: Front-load arterial roads crossing justice-priority neighborhoods.

1-3 Years

Cost $$$

Building Envelope Justice Fund

Improves passive cooling and reduces nocturnal indoor heat stress.

Equity lens: Distribute by health burden and heat exposure, not owner lobbying.

3-10 Years

Cost $$$

District Cooling Microgrids

Maintains survivable indoor temperatures during compounded outages.

Equity lens: Guarantee affordability covenants for low-income tenants.

3-10 Years

Cost $$

Heat Governance by Night Index

Shifts policy metrics from daytime highs to nocturnal mortality risk.

Equity lens: Embed community-led oversight and participatory budgeting.

Nights Rise Faster Than Days

Open-Meteo daily records (2000-2024) show summer nighttime minima climbing at a steeper rate than summer daytime maxima. This shrinks physiological recovery time and increases compounding heat risk across consecutive nights.

Threshold Nights Per Year

Annual counts of nights staying above 20C, 25C, and 30C. These are not just warm nights. They are interrupted recovery windows where cardiovascular and renal strain accumulates.

Heatwave Night Pulse

Hourly Open-Meteo reconstruction for the June 2024 heat period, condensed to nighttime windows.

Worst Night

21.5C

Unsafe Nights

0

Neighborhood Night Justice Map

Toggle live NASA GIBS layers and compare modeled neighborhood vulnerability from canopy deficits, impervious cover, AC access, and historical redlining pressure. Hotspots represent where night fails first.

Highest burden: Regent Park

Lowest burden: Rosedale

Regent Park

81.6

Vulnerability score

Historic disinvestment and lower AC access rates.

Downtown Core

77

Vulnerability score

High renter density and hardscape load.

Liberty Village

72.6

Vulnerability score

New dense builds with limited mature canopy.

Etobicoke South

61.7

Vulnerability score

Lake moderation helps but industrial surfaces hold heat.

AI Advisor

AI Signals Interpreter

Translate trend acceleration, heatwave burden, and live hazard context into an actionable climate-risk narrative.

AI-enabled