hot spots

City of Houston works to map heat across town for larger climate resiliency plans

The Houston Harris Heat Action Team is working to locate Houston's hottest spots. Screenshot via h3at.org

On August 7, when the thermometer reached a high of 93 degrees, a squad of 85 temperature detectives fanned out across Houston and Harris County. Their objective: Map the area's urban heat.

Organizers of the one-day endeavor pinpointed 320 square miles of Houston and Harrison County for collection of data about urban heat. Hardware attached to cars and bicycles traveling on predetermined routes took temperature and humidity readings during three one-hour periods: 6-7 am, 3-4 pm, and 7-8 pm.

The devices tracked temperature changes throughout the day in places featuring various characteristics, such as lots of green space, pavement or buildings. In all, the "street scientist" volunteers measured temperature and humidity in 32 heat-mapping pockets covering 10 square miles each.

The heat-mapping initiative was coordinated by the Houston Harris Heat Action Team, a collaboration of the Nature Conservancy of Texas, Houston Advanced Research Center, City of Houston, and Harris County Public Health. The team's corporate partners are Lowe's and Shell.

The team says urban areas are especially prone to high temperatures due to a combination of hard surfaces (buildings and roads), limited vegetation (such as trees), and heat generators like cars and factories.

"This problem, known as the urban heat island effect, can create issues for human health, infrastructure, and quality of life. Understanding how temperatures vary based on qualities of the natural and built landscape can inform how we reduce the impacts of rising summer temperatures in our communities," the team says.

Marissa Aho, the city of Houston's chief resilience officer, says the heat-mapping data will be available this fall through an open-source platform. Aho offers a heat-mapping project in Honolulu as an example of how Houston's data will be presented.

The Resilient Houston plan, released in February by Houston Mayor Sylvester Turner, called for a heat-mapping effort like the one carried out August 7 and outlined ways to reduce urban heat, such as planting 4.6 million new native trees over the next 10 years and retrofitting roofs to decrease heat absorption. Aho says the heat-mapping data will bolster initiatives to lessen the "urban heat island" effect.

"Houstonians do not prepare for heat like we prepare for hurricanes, but we should," Turner says in a release. "Houston is getting hotter, and we need science and data to help identify where the greatest impacts are so we can keep Houstonians safer and our city more resilient."

According to the U.S. Department of Homeland Security, extreme heat — defined as at least two consecutive days with temperatures above 90 degrees — ranks as the country's No. 1 cause of weather-related deaths. A 2017 study published by the National Resources Defense Council found the Houston area averaged 18 dangerously hot summer days per year from 1975 to 2010. Without any action to combat urban heat, Houston's annual number of days hit by dangerous summer heat could rise to 80 from 2046 through 2055 and 90 from 2091 to 2100.

Urban heat "leaves vulnerable communities susceptible to the dangers of stress and stroke, leads to higher ozone levels, and reduces the quality of life for all residents of the region — creating especially dangerous conditions for communities already striving to overcome historic obstacles around access and resources, as well as those who engage in outdoor work and recreation," according to the release from the Houston Harris Heat Action Team.

Aside from the human toll, urban heat exacts a financial toll. A 2017 study by researchers in the United Kingdom, Mexico, and the Netherlands indicates overheated cities face climate-change costs at least twice as high as the rest of the world due to urban heat islands.

Organizers of Houston's heat-mapping project note that last August was the second warmest on record in the city, with seven consecutive days when the temperature topped 100 degrees. As climate change takes hold and Houston continues to expand, "these heat-related challenges continue to be exacerbated," the release states.

Jaime González, Houston Healthy Cities Program director at the Nature Conservancy, says the heat-mapping data gathered August 7 will help determine where to plant trees, install "green" roofs, and promote other heat-mitigation tactics.

"We have a number of nature-first solutions in our toolkit that can help us cool our cities, but the first step in combating climate- and infrastructure-caused urban heat is to know exactly where to start," González says.

Houston was one of 13 U.S. communities chosen to participate in this summer's Heat Watch program, led by Portland, Oregon-based environmental services company CAPA Strategies LLC and backed by the National Oceanic and Atmospheric Administration (NOAA).

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this one's for the ladies

Texas named a top state for women-led startups

A new report finds that the Lone Star State is ideal for female entrepreneurs. Photo via Getty Images

Who runs the world? According to Merchant Maverick's inaugural Best States for "Women-Led Startups'' study, Texas is a great place for women to be in charge.

The Lone Star state cracked the top 10 on the list, earning a No. 6 spot according to the small business reviews and financial services company, which based the study on eight key statistics about this growing segment of the economy. Colorado (at No. 1), Washington, Virginia, Florida, and Montana were the only states to beat out Texas on the rankings—leading the Merchant Maverick team to conclude that "the part of the country that lies west of the Mississippi is great for startups led by women entrepreneurs."

Women-led startups in Texas received $365 billion in VC funding in the last five years, the report found. This is the seventh largest total among U.S. states. Too, about 20 percent of Texans are employed at woman-led firms, which is the fifth highest percentage among states. Roughly 35 percent of employers in Texas are led by women.

A few other key findings that work in female founders' favor: The startup survival rate in Texas is nearly 80 percent. And a lack of state income tax "doesn't hurt either," the report says.

Still there are shortcomings. On a per capita basis, only 1.27 percent of Texas women run their own business. The average income for self-employed women is also relatively low ranking among states, coming in around $55,907 and landing at 31st among others.

This is not the first time Texas has been lauded as a land of opportunity for women entrepreneurs. A 2019 study named it the best state for business opportunities for women. Houston too has proven to support success for the demographic. The Bayou City was named in separate studies a best city for female entrepreneurs to start a business and to see it grow.

Still, as many findings have concluded, the realities of the pandemic loom for all startups and small business owners. The Merchant Maverick study was careful to add: "The pandemic has changed the economic landscape over the past year, and often for the worse.

"This means that not every metric may be able to accurately gauge how a state might fare amidst the pandemic," the report continues. "To help factor in COVID's impact, we included some metrics that take 2020 into account, but it will be a while until we get a full picture of the pandemic's devastation.""

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