In a climate-changed world, heat is all around us—extending summer unnaturally far into fall, scorching our cities, warming the ocean, fueling storms like Hurricane Milton, and claiming untold lives every year, both the deadliest of environmental risks and the least visible.
So when SWA looked at topics for our annual Summer Student Program in Houston, extreme heat naturally gravitated to the top of the list. Houston is one of the hottest cities in the U.S., and one of the least green—only 18% of the city has tree canopy, much of which is on private property. Studies show that in the next 25 years, Houston will go from 10 to 74 days a year with a heat index of 105°F or more—not an anomaly, but a clear upward trend. And to many experts, heat is known as a “threat multiplier,” amplifying the effects of flooding, drought, fire, and storms like Beryl, Helene, Milton, and the derecho that tore across Harris County in May.
While all of this is true, there’s good news: we already know how to cool cities. Architects, landscape architects, urban planners, and designers have an incredibly well-stocked toolkit: expanding contiguous, mature tree canopy, retrofitting buildings with high-albedo materials and green roofs, building cooling centers, and creating “cool corridors.” All of these can help lower ambient temperatures, improve air quality, and capture stormwater at a comparatively low cost.
For SWA’s 2024 Summer Student Program, created in partnership with Downtown Houston+ and a range of local partners, eight undergraduates from across the U.S. proposed an ambitious, blue-sky vision for heat adaptation in Houston’s urban core: a contiguous “Cool Loop” through downtown. What if, the students proposed, there was a single loop of cooling infrastructure from Avenida to Historic Main Street, from the Theater District to the Skyline District, from Buffalo Bayou to EaDo? Paired with “good heat”—civic improvements, activations, and programs that can help bring people downtown—the impact could be transformative.
Read the full story on the SWA website to learn more.
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