32 Heat Mapping Areas
Each numbered shape in the map above represents a 10-square mile area where community volunteers measured temperatures and humidity along predetermined routes over three separate one-hour periods, typically 6-7 a.m., 3-4 p.m., and 7-8 p.m.

On August 7, 2020, 84 community science volunteers measured Harris County's hottest and coolest places during a one-day heat mapping campaign.

The Houston Harris Heat Action Team (H3AT) used the temperature and humidity data collected by community volunteers to develop temperature maps of the region at three different times of day (6-7 a.m., 3-4 p.m., and 7-8 p.m). These maps will help the City of Houston, Harris County, and its partners design projects and policies that address heat-related health issues across the region.

Why we're MAPPING urban HEAT

Urban areas are especially prone to high temperatures due to a combination of hard surfaces (buildings, roads), limited vegetation (such as trees), and heat-producing factors like car use and industrial activity. 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.

This heat mapping project is part of a larger initiative, Heat Watch, lead by CAPA Strategies and supported by the National Oceanic and Atmospheric Administration (NOAA)'s Climate Program Office. The Houston/Harris County team is one of 13 communities selected to participate in 2020 summer campaigns.

2020 Houston/Harris County
Mapping Project Team Organizers