Glossary

Extreme Heat Exposure

Also known as: Heat Stress Risk

A chronic physical climate risk category measuring a property's vulnerability to rising frequency and intensity of high-temperature days, which drive up cooling costs, stress mechanical equipment, threaten outdoor and industrial worker safety, and can trigger new regulatory requirements.

Extreme heat is frequently underweighted relative to more visible acute hazards like hurricanes or wildfire in CRE risk assessment, despite producing measurable financial impacts: elevated cooling degree days increase operating expenses and can strain HVAC systems designed for historical rather than projected climate conditions, while jurisdictions have begun adopting outdoor and indoor workplace heat exposure standards that affect industrial, logistics, and construction operations. For multifamily and industrial assets in particular, extreme heat exposure is increasingly incorporated into physical climate risk and Climate Value-at-Risk models alongside more traditional catastrophe risks, since heat-driven equipment failure and increased peak electricity demand (with associated grid reliability and utility cost implications) represent a quantifiable, recurring operating cost pressure rather than a low-probability tail event. Asset-level resilience responses include reflective or vegetated roofing to reduce heat island effects, upsized HVAC capacity and redundancy, and, for older buildings lacking central air conditioning, retrofit cooling installations increasingly viewed as a habitability and liability issue rather than a discretionary amenity upgrade.