Skip to Main Content
School of Public Health

​
  • Admissions
  • Research
  • Education
  • Practice
​
Search
  • Newsroom
    • School News
    • SPH This Week Newsletter
    • SPH in the Media
    • SPH This Year Magazine
    • News Categories
    • Contact Us
  • Research
    • Centers and Groups
  • Academic Departments
    • Biostatistics
    • Community Health Sciences
    • Environmental Health
    • Epidemiology
    • Global Health
    • Health Law, Policy & Management
  • Education
    • Degrees & Programs
    • Public Health Writing
    • Workforce Development Training Centers
    • Partnerships
    • Apply Now
  • Admissions
    • Applying to BUSPH
    • Request Information
    • Degrees and Programs
    • Why Study at BUSPH?
    • Tuition and Funding
    • SPH by the Numbers
    • Events and Campus Visits
    • Admissions Team
    • Student Ambassadors
    • Frequently Asked Questions
  • Events
    • Public Health Conversations
    • Full Events Calendar
    • Alumni and Friends Events
    • Commencement Ceremony
    • SPH Awards
  • Practice
    • Activist Lab
  • Careers & Practicum
    • For Students
    • For Employers
    • For Faculty & Staff
    • For Alumni
    • Graduate Employment & Practicum Data
  • Public Health Post
    • Public Health Post Fellowship
  • About
    • SPH at a Glance
    • Advisory Committees
    • Strategy Map
    • Senior Leadership
    • Accreditation
    • Diversity, Equity, Inclusion, and Justice
    • Directory
    • Contact SPH
  • Support SPH
    • Big Ideas: Strategic Directions
    • Faculty Research and Development
    • Future of Public Health Fund
    • Generation Health
    • idea hub
    • Public Health Conversations
    • Public Health Post
    • Student Scholarship
    • How to Give
    • Contact Development and Alumni Relations
  • Students
  • Faculty & Staff
  • Alumni
  • Directory
Read More News
health disparities

US Excess Deaths Continued to Rise Even After the COVID-19 Pandemic

Erin Johnston
Global Health

Student Receives 2025 Pulitzer Center Reporting Fellowship

Heat May Kill More People in the US Than Previously Reported.

June 19, 2020
Twitter Facebook

City in a heat waveAs temperatures rise this summer, a new study by researchers from the School of Public Health and the University of British Columbia School of Population and Public Health (UBC SPPH) finds that thousands of US deaths may be attributable to heat each year, far more than the 600 deaths previously estimated by the Centers for Disease Control and Prevention (CDC).

Published in the journal Environmental Epidemiology, the study estimates that heat contributed to the deaths of 5,600 people each year on average between 1997 and 2006 in 297 counties comprising three-fifths of the U.S. population.

Most of these deaths were from only moderately hot weather, rather than extremely hot weather—categories that the researcher defined not by temperature, but by what temperatures are normal for a given region of the US

“How dangerous a hot day is may depend on where you live,” says study lead author Kate R. Weinberger, assistant professor of occupational and environmental health at UBC SPPH.

“A 90˚F day might be dangerous in Seattle, but not in Phoenix,” she says. “One of the factors that gives rise to this phenomenon is differing degrees of adaptation to heat. For example, air conditioning is much more common in cities like Phoenix that experience hot weather frequently versus cities like Seattle with cooler climates,” Weinberger says, noting that demographic factors can also affect how vulnerable a population is to heat—heat especially endangers older adults, children, pregnant women, and outdoor workers.

The researchers used data from the National Center for Health Statistics on deaths in the most populous counties (1997 to 2006 was the most recent decade with continuous data available), and the Parameter-elevation Relationships on Independent Slopes Model (PRISM), which estimates temperatures across the contiguous US down to the four-square-kilometer area. While most previous research has focused on the information provided on death records to try to estimate deaths from heat, this study analyzed the association between days considered moderately or extremely hot in that county and the number of deaths from any cause, showing that not hundreds but thousands of deaths are tied to heat. The researchers estimated that moderate heat killed 3,309 people per year in the counties included in the study, and extreme heat killed 2,299 people each year.

“These estimates do not depend on anyone recognizing that a given death was due to excess heat, so they are likely closer to the true number than previous estimates,” says study senior author Gregory Wellenius, director of SPH’s Climate and Health program and professor of environmental health (appointment pending).

“Heat is very much a threat to the health of our communities and our families today,” he says. “Public health officials have a responsibility to implement heat action plans—as many communities across the world already have—in order to warn residents ahead of days of extreme heat and to help residents cope with the heat and minimize their health risks.”

However, the researchers point out that COVID-19 will make it harder to stay cool this summer. “Providing publicly accessible air conditioned spaces on hot days now carries additional risks and requires new protocols for keeping people safe from both heat and infection,” Wellenius says.

“At the same time, with many offices, malls, stores, restaurants, and other commercial buildings still largely closed, this summer people are even more reliant on home air conditioning than ever before,” he says. “Given the high unemployment rates, particularly among vulnerable communities, we may see an even bigger impact of heat on people’s health this summer.”

The study was co-authored by Keith Spangler, postdoctoral associate in environmental health; and by Daniel Harris of the University of Toronto Dalla Lana School of Public Health and Antonella Zanobetti of the Harvard T.H. Chan School of Public Health.

—Michelle Samuels

Explore Related Topics:

  • climate
  • climate change
  • death
  • urban health
  • urban populations
  • Share this story

Share

Heat May Kill More People in the US Than Previously Reported

  • Facebook
  • Reddit
  • LinkedIn
  • Email
  • Print
  • More
  • Twitter

More about SPH

Sign up for our newsletter

Get the latest from Boston University School of Public Health

Subscribe

Also See

  • About
  • Newsroom
  • Contact
  • Support SPH

Resources

  • Students
  • Faculty & Staff
  • Alumni
  • Directory
  • Boston University School of Public Health
  • 715 Albany Street, Boston, MA 02118
  • © 2021 Trustees of Boston University
  • DMCA
  • Facebook
  • YouTube
  • LinkedIn
  • Instagram
  • TikTok
© Boston University. All rights reserved. www.bu.edu
Boston University Masterplate
loading Cancel
Post was not sent - check your email addresses!
Email check failed, please try again
Sorry, your blog cannot share posts by email.