Houston is facing rising temperatures that researchers link to its large areas of vacant pavement and abandoned buildings. According to Texas A&M University, the city has about 10,000 acres of abandoned structures and another 45,000 acres of paved but unused lots. These empty spaces are contributing to what scientists call the “urban heat island” effect.
Researcher Dingding Ren used drone imagery and NASA satellite data to determine that concrete surfaces can raise land surface temperatures by up to 20 degrees compared to vegetated areas. This means these urban blighted areas retain more heat for longer periods, making the city’s overall temperature higher.
Houston’s office vacancy rate stands at around 26 percent, one of the highest in the country. As a result, many buildings remain empty and unused, further adding to the problem. The city has started demolishing some unsafe and vacant properties. For example, several Midtown buildings are scheduled for demolition before the 2026 FIFA World Cup.
Other strategies focus on cooling rather than demolition. The Resilient Houston plan aims to expand tree coverage by planting 4.6 million native trees by 2030 and promoting lighter-colored roofs. Trees For Houston, a nonprofit organization involved in this initiative, plans to plant approximately 800,000 trees during this decade.
Developers are also taking part by including shade trees and reflective materials in new projects. Ward commented on these efforts: “When everyone shares responsibility — the city, NGOs and developers — that’s when we really move the ball down the field.”
The impact of heat extends beyond comfort levels; it can affect tourism numbers, increase pressure on energy systems, and lower economic productivity due to hotter pavements and rooftops.
Downtown Houston+ CEO Kristopher Larson addressed this issue last week: “We set out to build a climate-controlled city,” he said in his State of Downtown address. “Now, we’re learning to embrace our outdoor spaces again.”
One example is Discovery Green park downtown which draws over three million visitors each year despite high temperatures. The city is working on redesigning streets like McKinney and Preston with more trees and shaded areas as part of its Downtown Public Realm Action Plan.
