Aviation·Heathrow Airport Grass Standards·—·Heathrow Airport Grass Standards

Heathrow Airport Climate-Resilient Grass Standards

Drought-tolerant fescue + ryegrass mix · 8.96 tCO2eq/ha carbon sequestration · 2024 deployment

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Key insight

Grass die-off at Heathrow in 2020 created operational disruptions (dust, bird strike, fire risk) that would have cost far more than the grass replacement programme. Proactive species switching ahead of the next heatwave is a low-cost, high-certainty adaptation.

Transferability to UK: HighDirectly applicable to UK airports, and to rail and highway earthwork embankments where vegetation loss under heatwave or drought conditions creates erosion, du

Following Heathrow's 2020 heatwave (37.8°C) and 2022 record (40.2°C) which killed much of the airfield's grass — creating dust, fire hazard and bird strike risks — Heathrow adopted a deep-rooted fescue/ryegrass mix bred for drought, heat, cold, disease and salt tolerance. Replacing existing grass species over 5–6 years within routine maintenance budgets. Sequesters 8.96 tCO2eq/ha as a co-benefit.

Climate drivers

High temperaturesDrought

Impacts

→Vegetation dieback→Dust generation→Bird strike risk increase→Fire hazard

Adaptation measures

  • Climate-resilient grass species (rhizomatous tall fescue + tetraploid perennial ryegrass)
  • Species selection for deep root systems
  • Planned gradual airfield resurfacing over 5–6 years

Assets affected

Airport servicesAirfield grass zones

Investment

Integrated into ongoing maintenance programme; initial capital not separately reported

Band: Under £1m

Delivery period

—

  • An extended period of no rainfall in 2020 combined with a summer heatwave resulted in Heathrow recording a temperature of 37.8°C .
  • The highest temperature ever recorded at Heathrow Airport is 40.2°C in July 2022 .
  • Much of the grass in the green zones at Heathrow Airport died during the heatwave of 2020 .
  • Potential hazards from this included the creation of dust, dry grass and increased bird numbers occupying the area of ground previously taken up by longer grass .
  • Dust creation can occur because of vegetation dieback and winds eroding dry exposed soils .
  • Dust conditions near or on the runways affect aircraft take-off and landing by impacting brakes, engines and visibility .
  • Dry grass can become a potential fire hazard to aircraft, machinery and vehicles on the runways.
  • Increased bird numbers on the airport increases the risk of bird strike to aircraft taking off and landing .
  • Heatwaves and drought events are projected to become more frequent and intense in Southeast England because of climate change .

Ref: ID_33 · Heathrow Airport Grass Standards · Curated & verified by HIVE

Transferability to UK: High

Directly applicable to UK airports, and to rail and highway earthwork embankments where vegetation loss under heatwave or drought conditions creates erosion, dust and safety risks. Species selection and root depth are the key variables for any open-ground transport asset.

UK contexts

UK airports' airside grass managementRail embankment vegetation managementHighway cutting and embankment slopesSouthern England transport green spaces

London & South East

Transfer to other sectors (AI)