Reducing urban heat exposure
Fictional decision exercise. A fictional city has £4 million. Each estimate counts vulnerable residents with improved access to a cooler space during daytime heat. The options are alternatives; do not add their benefits together.
| Option | Capital cost (£ million) | Residents with improved access (Estimated count) |
|---|---|---|
| Street trees | 3.4 | 3200 |
| Cool public centres | 2.3 | 2100 |
| Reflective roofs | 3.8 | 2800 |
Options
Street trees
3.4
Shade and other ecosystem benefits
Trees take time to grow
water and maintenance are required
Cool public centres
2.3
Immediate indoor refuge during opening hours
Transport and opening hours limit access
Reflective roofs
3.8
Reduces heat gain in selected buildings
Benefits depend on occupancy and building condition
Stakeholder evidence
Older resident: I need a nearby space I can reach.
Maintenance team: Trees need long-term care.
Housing manager: Indoor conditions differ across buildings.
Use the resource
Read possible decision reasoning
A strong response can favour any listed option when its priorities and evidence are consistent. Compare costs with the available budget, use the residents with improved access measure accurately, and discuss at least one limitation. Explain why an alternative is less suitable for the stated priority. Estimates do not guarantee outcomes; identify further information needed before a real decision.