Climate Risk Heatmap Calculator

Enter climate and control inputs

Use this calculator to score physical and transition risks, estimate residual exposure, and place the result on a 5×5 climate risk heatmap.

Profile and scenario setup

Asset / business unit

Scenario name

Risk owner

Time horizon (years)

Base likelihood (1–5)

Scenario severity (1–5)

Asset criticality (1–5)

Financial exposure

Vulnerability / sensitivity (1–5)

Adaptive capacity (1–5)

Control effectiveness (1–5)

Physical risk weight

Transition risk weight

Physical hazard scoring

Flood hazard score (0–5)

Heat hazard score (0–5)

Drought hazard score (0–5)

Storm hazard score (0–5)

Wildfire hazard score (0–5)

Transition pressure scoring

Carbon price exposure (0–5)

Regulatory exposure (0–5)

Market shift pressure (0–5)

Technology disruption (0–5)

Reputation pressure (0–5)

Impact dimension scoring

Financial impact score (1–5)

Operational impact score (1–5)

Compliance impact score (1–5)

Reputational impact score (1–5)

Notes

Scenario notes

Reset

Example data table

This sample table shows how different assets can map to different climate risk positions.

Asset	Scenario	Residual likelihood	Residual impact	Matrix score	Band
Coastal plant	Delayed Transition 2035	4	4	16	Severe
Urban office portfolio	Orderly Transition 2030	3	3	9	Moderate
Distribution hub	Hot House World 2040	5	4	20	Extreme
Data center	Net Zero 2050	2	4	8	Moderate

Formula used

1) Physical average
Physical Average = (Flood + Heat + Drought + Storm + Wildfire) ÷ 5

2) Transition average
Transition Average = (Carbon Price + Regulatory + Market Shift + Technology Disruption + Reputation Pressure) ÷ 5

3) Weighted hazard
Weighted Hazard = ((Physical Average × Physical Weight) + (Transition Average × Transition Weight)) ÷ Total Weight

4) Adjusted hazard
Adjusted Hazard = Weighted Hazard × Severity Factor × Horizon Factor, then constrained to a 1–5 range

5) Impact composite
Impact Composite = 0.28×Financial + 0.27×Operational + 0.18×Compliance + 0.17×Reputation + 0.10×Exposure Tier

6) Inherent likelihood
Inherent Likelihood = 0.50×Base Likelihood + 0.35×Adjusted Hazard + 0.15×Scenario Severity

7) Inherent impact
Inherent Impact = 0.45×Impact Composite + 0.25×Vulnerability + 0.20×Adjusted Hazard + 0.10×Asset Criticality

8) Residual scores
Mitigation Strength = (Adaptive Capacity + Control Effectiveness) ÷ 10
Residual Likelihood = Inherent Likelihood × (1 − 0.18×Mitigation Strength)
Residual Impact = Inherent Impact × (1 − 0.22×Mitigation Strength)

9) Heatmap and index
Heatmap Cell = round(Residual Likelihood) × round(Residual Impact)
Risk Index = (Likelihood × Impact ÷ 25) × 100

How to use this calculator

Enter the asset or business unit and name the scenario.
Set the time horizon, base likelihood, and scenario severity.
Score physical hazards from 0 to 5 for the relevant asset.
Score transition pressures from 0 to 5 using your policy and market view.
Add impact scores for financial, operational, compliance, and reputational effects.
Enter vulnerability, adaptive capacity, and current control effectiveness.
Choose physical and transition weights to reflect your assessment method.
Press the calculate button to see the result above the form.
Review the matrix score, risk band, and recommendation.
Use the CSV and PDF buttons to export the calculated output.

FAQs

1) What is a climate risk heatmap calculator?

It is a scoring tool that combines likelihood, impact, hazards, and controls. The output places a risk on a 5×5 matrix so teams can compare exposures consistently and prioritize action.

2) Why separate physical and transition risks?

Physical risks come from climate hazards like heat or flooding. Transition risks come from policy, technology, market, and reputation shifts. Separating them improves transparency and helps you adjust weighting by sector.

3) What does residual risk mean here?

Residual risk is the remaining exposure after adaptive capacity and control effectiveness reduce inherent likelihood and impact. It is useful for management reporting because it reflects the post-mitigation position.

4) How should I choose the weights?

Use higher physical weighting when assets are sensitive to climate hazards. Use higher transition weighting when regulation, carbon costs, technology shifts, or customer expectations dominate the exposure profile.

5) Why does the horizon affect the score?

Longer horizons can increase exposure because climate effects or policy tightening may accumulate over time. The calculator applies a modest horizon factor so future scenarios can shift hazard intensity upward.

6) Can this support governance and reporting?

Yes. It helps structure internal discussions, prioritization, and documentation. It can support climate governance workflows, though formal disclosures should still follow your selected reporting standard and assurance process.

7) Is the matrix score enough by itself?

No. The matrix is helpful for prioritization, but decision-makers should still review scenario assumptions, asset dependencies, geographic context, and mitigation feasibility before allocating capital or setting targets.

8) Can I use this instead of detailed scenario analysis?

No. This tool is a practical screening and governance aid. Detailed scenario analysis, engineering studies, and financial modeling remain necessary for investment cases, disclosure support, and adaptation planning.