Engineers in the Netherlands have found an innovative way to tackle urban flooding by transforming parking garages into temporary water storage facilities. During periods of intense rainfall, when drainage systems struggle to cope with the volume of water, these garages can safely hold excess rainwater and help prevent streets from flooding.
The system works by incorporating lowered sections and specialized drainage channels within the structure. When heavy storms occur, water is directed into designated storage areas on the lower levels, while vehicles are moved to higher floors or removed if necessary. After the storm passes, the stored water is gradually released back into the drainage network at a controlled rate, reducing pressure on city infrastructure.
What makes this solution particularly effective is its ability to serve two purposes at once. Instead of constructing entirely new flood-control facilities, cities can adapt existing parking structures to help manage the growing challenges of extreme weather and climate change. It is a practical, cost-efficient example of how urban spaces can be redesigned to become more resilient and sustainable.
In the bustling Colombian city of Medellín, urban planners tackled the intensifying heat island effect through an innovative Green Corridors initiative.
Starting around 2016, the project transformed 18 roads and 12 former waterways into interconnected networks of lush vegetation spanning about 20 kilometers.
Workers planted approximately 880,000 trees and 2.5 million smaller plants, including shrubs and ground cover carefully chosen for the tropical climate.
These green arteries provide essential shade, block direct sunlight on pavement, and promote evapotranspiration, where plants release moisture that cools surrounding air.
The result has been remarkable: average city temperatures dropped by around 2°C, with localized reductions reaching up to 5°C or more in shaded corridors. Surface temperatures in some areas fell dramatically, from over 40°C to around 30°C.
Beyond cooling, the greenery improves air quality by filtering pollutants, supports biodiversity by attracting birds and insects, and creates more comfortable public spaces for walking and cycling.
The initiative also delivered social benefits, training residents from disadvantaged neighborhoods as gardeners and generating thousands of jobs in maintenance and landscaping.
At a cost of about $16.3 million initially—roughly $6.50 per resident—it proves nature-based solutions can be affordable and effective against climate challenges.
As Medellín continues maintaining these corridors, the project serves as a global model for cities seeking resilient, equitable urban environments that harness the power of plants to combat rising temperatures.
Source: C40 Cities Knowledge Hub - "Cities100: Medellín's interconnected green corridors". See less
In Sweden, architecture is learning to breathe with the weather. Across several cities, parking garages — long considered static, concrete spaces — are being reengineered to serve a second, urgent purpose. During periods of heavy rain, these garages transform into stormwater basins, capturing overflow that might otherwise flood streets and homes. It’s an elegant solution where infrastructure absorbs impact, not just cars.
The lower levels of these garages are designed with waterproof walls, sloped floors, and gated drainage channels that can open during storms. As water rises, the space fills in stages, guided by sensors and automated valves. Vehicles are redirected well in advance, while the structure quietly becomes a buffer — holding thousands of liters of runoff without damage.
Above ground, the transition is barely visible. Inside, markings and materials indicate the dual function — flood-resistant paint, rubber seals around doors, and elevated electric systems to protect from short circuits. Once the storm passes, pumps gradually release the water into treatment channels or nearby lakes, and the garage dries out, ready for its usual rhythm.
What makes this system remarkable is its invisibility until needed. No new buildings, no sprawling reservoirs — just smarter use of existing concrete. In Sweden, resilience doesn't always look like walls or barriers. Sometimes, it’s a parking garage that knows how to become a lifeboat.
#parkingwithpurpose#urbanfloodcare#swedenadaptssilently#fblifestyle
In Singapore, advanced urban infrastructure is tackling the growing challenge of flash floods with the introduction of smart drains. These drainage systems are equipped with sensors that monitor rainfall intensity, water levels, and flow rates in real time. When heavy rain is detected, the smart drains automatically open their gates or adjust flow channels to direct excess water away from vulnerable areas, reducing the risk of urban flooding.
The system is linked to a central control network, allowing authorities to respond instantly to changing weather conditions. In some cases, the drains can work in coordination with detention tanks and flood barriers, creating a layered defense against sudden downpours. This automation not only protects streets and properties but also minimizes disruption to traffic and public services.
Singapore’s approach reflects its forward-thinking urban planning, where technology and sustainability go hand in hand. By preventing water from accumulating in low-lying areas, the smart drains help protect both infrastructure and the daily lives of residents. As climate change increases the frequency of extreme weather events, such innovations could serve as a model for other flood-prone cities worldwide.
This pavement could save us from urban floods 🌧️
(It absorbs 2 million gallons of water annually!)
Urban flooding causes $9 billion in damages annually in the US alone.
When rain falls on traditional concrete, it has nowhere to go.
The result?
↳ 55% becomes immediate runoff (vs 10% in natural areas)
↳ Carries 2.5 million tons of pollutants yearly into US waterways
↳ Overwhelms aging infrastructure built for lighter rainfall
Instead of accepting this reality...
... Greg Johnson looked to nature for answers
Aquipor was born - a concrete that acts like soil.
Here's how their porous pavement works:
A) Water passes through tiny interconnected voids
B) Pollutants get filtered naturally as water moves down
C) Clean water replenishes groundwater right where it falls
D) No runoff, no flooding, no strain on treatment systems
E) Reduces heat of area by up to 4°C through water retention
The impact is impressive:
↳ Absorbs up to 10 inches of rainfall hourly
↳ Redirects 2 million gallons of stormwater per mile yearly
↳ Made from upcycled materials with lower carbon footprint
And it could scale:
↳ Pilot projects launching in multiple cities
↳ Cost-competitive with traditional solutions
↳ Designed to work with existing infrastructure
From impermeable infrastructure that floods cities...
...to pavement that works with nature, not against it.
Would you like to see this installed in your neighborhood?
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For a country that is 26% under sea level, the Netherlands is remarkably dry.
Yet, climate change is changing that, and not in the way that might first come to mind: While sea level rise is a looming threat constantly battering the Dutch coast, a growing concern has become the water coming from above – rain.
Storms have become more and more severe in recent years, and cities have been struggling to adequately adapt: In July 2021, rains caused whole regions in the south of the Netherlands to flood – over 700 buildings were severely damaged and €400 million in damages were recorded. Over the border in Germany, at least 177 people lost their lives as a result of the floods.
While soil acts as a natural sponge for water, concrete simply holds it - unless redirected. With peak storm levels increasing, cities have to improve adaptation measures. So what are some?
More nature in cities:
Integrating more green spaces within cities can create a 'sponge effect'. Gardens, trees, and permeable pavements are key ways to enhance the sponge effect and allow water to infiltrate the ground instead of overwhelming drainage systems.
Non-essential low-lying areas:
In some Dutch cities, non-essential low-lying areas have been transformed into water squares, such as Watersquare Benthemplein in Rotterdam. These spaces are designed to temporarily hold excess rainwater during heavy rainfall. During dry periods, they serve as public spaces and recreational areas.
Elevated buildings:
To protect against flood risks, new buildings in flood-prone areas are being designed with elevated ground levels. This elevation strategy ensures that critical infrastructure and residential properties remain above water levels during heavy rainfall and storm surges.
Green roofs:
The concept of green roofs, where vegetation is installed on rooftops, is gaining popularity in Dutch cities. Green roofs help retain rainwater, reduce runoff, and provide insulation, making buildings more energy-efficient while contributing to flood mitigation efforts.
Improved drainage systems:
This one's low hanging fruit: Dutch cities are investing in upgraded and innovative drainage systems to cope with heavier rainfall. These systems are designed to handle large volumes of water efficiently and redirect it away from urban areas to prevent flooding.
Climate-adaptive urban planning:
Dutch cities are incorporating climate adaptation measures into their urban planning processes. This includes developing flood risk maps, identifying vulnerable areas, and incorporating climate resilience criteria into building codes and development regulations.
Smart technologies and data analysis:
The use of smart technologies, such as sensors and real-time data analysis, enables more efficient monitoring of rainfall patterns, water levels, and infrastructure performance.
Let me know what you think!
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The Colombian city of Medellín transformed its urban environment through its internationally recognized Green Corridors program, planting approximately 880,000 trees and 2.5 million shrubs and plants along streets, parks, rivers, and public spaces. The project reduced average urban temperatures by up to 3.6°F (2°C) while improving air quality, biodiversity, and public health.
The city also created more than 30 interconnected green corridors, helping absorb carbon dioxide, reduce the urban heat island effect, improve stormwater management, and create cooler neighborhoods during extreme heat. Medellín's success has become a global model for climate-resilient urban planning, demonstrating that investing in nature can deliver measurable environmental and health benefits while reducing the need for energy-intensive cooling.
Source: Medellín City Authority / C40 Cities, 2026
#Climate#UrbanPlanning#Sustainability#Environment#UnboxFactory
In the Netherlands, where much of the land lies below sea level, staying ahead of rising waters is a matter of national survival. That’s why Dutch engineers have developed smart dikes — inflatable flood barriers that automatically activate when water levels rise. These high-tech defenses are designed to detect danger early and respond within minutes, without human intervention.
The system uses sensors to constantly monitor river and canal levels. When the water reaches a critical threshold, the smart dike inflates from a flat, hidden position into a sturdy barrier. It’s like a giant airbag for floods — expanding instantly to block the incoming surge. Once the danger passes, the barrier deflates and disappears back into the ground, allowing roads, paths, or open spaces to return to normal.
Unlike traditional flood walls, these smart dikes are flexible, fast, and require minimal space. They're ideal for cities and towns where permanent structures would be too bulky or disruptive. The Netherlands has long been a global leader in water management, and this innovation blends centuries of experience with cutting-edge automation.
As climate change leads to more unpredictable storms and rising sea levels, these smart dikes offer a glimpse into the future of urban resilience. They’re a quiet but powerful line of defense — invisible until needed, then rising like guardians to protect communities from the sea.
TIME magazine's recent feature on urban greenways highlights a powerful trend reshaping American cities: the transformation of abandoned industrial corridors into vibrant public spaces that connect neighborhoods, improve health outcomes, and foster community.
From Detroit's ambitious Joe Louis Greenway (a $240 million, 27.5-mile network connecting 23 neighborhoods) to New Orleans' Lafitte Greenway (which hosts farmers markets, fitness classes, and has become a catalyst for local businesses), these projects demonstrate how thoughtful design can turn urban voids into valuable community assets.
The economic benefits are substantial—New York's High Line attracts 8 million visitors annually and has spurred significant development along its path. But perhaps more important are the social and health benefits: research shows that increasing urban green space by just 10% can reduce loneliness, with even stronger effects for people living alone.
However, as Boston University lecturer Anne Lusk, Ph.D. points out, many greenways still lack critical amenities like bathrooms, benches, and adequate tree canopy. To maximize their impact, cities need to:
Ensure greenways connect seamlessly with protected bike lanes and pedestrian infrastructure
Add more amenities that serve diverse community needs
Address climate resilience through increased tree canopy and sustainable design
Prioritize equitable access across neighborhoods
As designers and advocates for healthy communities, we should view greenways not just as recreational amenities but as critical social infrastructure—spaces that can help combat loneliness, improve physical health, and strengthen neighborhood bonds.
What greenway projects are you excited about in your community? How might we design these spaces to better serve everyone?
#UrbanDesign#Greenways#CommunityWellbeing#SocialInfrastructureJoe Louis Greenway Partnership (JLGP)Friends of Lafitte Greenway Video by Joey Lautrup, piece by Micheline Maynard