Davao City registers above normal heat index
Published Mar 27, 2023 05:27 am
DAVAO CITY – The urban heat index here is already above normal, Davao City-based environmental group Interfacing Development Interventions for Sustainability (IDIS) Inc. said.
Lemuel Lloyd Manalo, IDIS program coordinator, said that the recent heat index over 40 degrees Celsius was already above normal based on the Universal Thermal Climate Index (UTCI) heat scale.
A YOUNG girl and her dog beat the searing heat by swimming in a beach in Noveleta, Cavite. (Ali Vicoy)
This is a significant increase from the reported average temperatures of 26 degrees Celsius in 2016, 27.5 in 2018, and 32.5 in 2019 based on the record of the Weather Monitoring Station at the Davao International Airport. Based on the UTCI heat scale, he said the 40 degrees Celsius indicates a very strong heat stress and above 50 degrees Celsius, an extreme heat stress, noting that the city’s ambient temperature has been increasing since 2014, especially during the dry season. According to Climate Change Service, the UTCI is a bioclimatic index for describing the physiological comfort of the human body under specific meteorological conditions. It takes into account not just the ambient temperature but also other variables like humidity, wind, and radiation, all factors significantly affecting our physiological reaction to the surrounding environment. Manalo said the increasing heat index is attributed to the global warming crisis.
He added that rising local temperature is also associated with the influx of population and rapid development of more urbanized areas. Manalo said the city’s fully urbanized areas are projected to increase from 4,031 hectares in 2015 to 16,398 hectares in 2045. He said the key in addressing the rise of urban heat index includes nature-based solutions and low-impact development. “Several government plans and policies have already been put in place, such as the protection of urban trees and remaining forest patches and tree-line canopy avenues, increase of parks, green spaces, landscaping, and permeable surfaces,” he said. With the temperature rise, he said the implementation of these programs is urgently needed. He said more public covered walkways and waiting sheds must be incorporated into the infrastructure development plans. “Davao City's green building ordinance should also incorporate and require sufficient ventilation and natural airflow use in building designs,” he said.
A YOUNG girl and her dog beat the searing heat by swimming in a beach in Noveleta, Cavite. (Ali Vicoy)
This is a significant increase from the reported average temperatures of 26 degrees Celsius in 2016, 27.5 in 2018, and 32.5 in 2019 based on the record of the Weather Monitoring Station at the Davao International Airport. Based on the UTCI heat scale, he said the 40 degrees Celsius indicates a very strong heat stress and above 50 degrees Celsius, an extreme heat stress, noting that the city’s ambient temperature has been increasing since 2014, especially during the dry season. According to Climate Change Service, the UTCI is a bioclimatic index for describing the physiological comfort of the human body under specific meteorological conditions. It takes into account not just the ambient temperature but also other variables like humidity, wind, and radiation, all factors significantly affecting our physiological reaction to the surrounding environment. Manalo said the increasing heat index is attributed to the global warming crisis.
He added that rising local temperature is also associated with the influx of population and rapid development of more urbanized areas. Manalo said the city’s fully urbanized areas are projected to increase from 4,031 hectares in 2015 to 16,398 hectares in 2045. He said the key in addressing the rise of urban heat index includes nature-based solutions and low-impact development. “Several government plans and policies have already been put in place, such as the protection of urban trees and remaining forest patches and tree-line canopy avenues, increase of parks, green spaces, landscaping, and permeable surfaces,” he said. With the temperature rise, he said the implementation of these programs is urgently needed. He said more public covered walkways and waiting sheds must be incorporated into the infrastructure development plans. “Davao City's green building ordinance should also incorporate and require sufficient ventilation and natural airflow use in building designs,” he said.