06/25/2026
🌲⛈️ We cannot solve our flooding problems with concrete alone. Our islands need absorption. 🏗️📉
In a timely commentary for Honolulu Civil Beat, Jennifer Maydan and Kialoa Mossman highlight a critical truth for Hawaiʻi’s climate adaptation: traditional gray infrastructure (culverts and concrete channels) is being pushed past its limits by intensifying climate-driven rain storms. 🌧️💥
When natural landscapes are paved over, water rushes unchecked into our valleys—leading to faster runoff, higher flood peaks, and downstream damage.
🛡️ The Solution? Trees as Critical Infrastructure.
Just like roads and water lines, urban forests are vital public assets. Trees and healthy soil act as widespread sponges that protect our communities by:
Intercepting heavy rain before it hits the asphalt.
Increasing soil infiltration and stabilizing steep valley slopes.
Reducing total runoff volume to prevent low-lying neighborhood floods.
Filtering water from ridge to reef before it hits fragile corals. 🐠🌊
📍 Smarter Rebuilding Across the Islands
The authors point to critical areas where integrating green stormwater infrastructure into our recovery models is essential:
Oʻahu (Haleʻiwa & Waialua): Retrofitting flood corridors with expanded canopies and permeable surfaces to catch storm water early.
Maui (Lahaina, Kula, & Kīhei): Restoring soil and replanting fire-impacted lands to stabilize the earth and prevent post-fire flash floods.
ʻĪao Valley & Wahiawā: Planting riparian forest buffers to slow down massive high-volume water flows moving from steep mauka terrain.
🌳 Active, Smart Management
Investing in living infrastructure means choosing the right native canopy for the right microclimate, removing high-failure invasive species (like albizia), and protecting root zones during development.
We can keep rebuilding the same fragile layouts, or we can choose a living, resilient landscape that protects our communities from ridge to reef. 🌴💚
👇 Read the full commentary: 👇
🔗 https://civilbeat.org/2026/06/hawai%CA%BBi-must-build-smarter-after-the-floods-with-trees-as-infrastructure/
