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Home Educational Resources Using the Heat Index Training Online Toolkit
A slideshow with photos depicting various workers being proactive about heat illness prevention.

Photos by: CAL-OSHA

Welcome to OSHA's Campaign to Prevent Heat Illness in Outdoor Workers

HEAT ILLNESS CAN BE DEADLY. Every year, thousands of workers become sick from exposure to heat, and some even die. Heat illnesses and deaths are preventable. Employers are responsible for providing workplaces that are safe from excessive heat.

What is heat illness?

The body normally cools itself by sweating. During hot weather, especially with high humidity, sweating isn't enough. Body temperature can rise to dangerous levels if precautions are not taken such as drinking water frequently and resting in the shade or air conditioning. Heat illnesses range from heat rash and heat cramps to heat exhaustion and heat stroke. Heat stroke requires immediate medical attention and can result in death.

How can heat illness be prevented?

Employers should establish a complete heat illness prevention program to prevent heat illness. This includes: provide workers with water, rest and shade; gradually increase workloads and allow more frequent breaks for new workers or workers who have been away for a week or more to build a tolerance for working in the heat (acclimatization); modify work schedules as necessary; plan for emergencies and train workers about the symptoms of heat-related illnesses and their prevention; and monitor workers for signs of illness. Workers new to the heat or those that have been away from work and are returning can be most vulnerable to heat stress and they must be acclimatized (see box).

To prevent heat related illness and fatalities:

  • Drink water every 15 minutes, even if you are not thirsty.
  • Rest in the shade to cool down.
  • Wear a hat and light-colored clothing.
  • Learn the signs of heat illness and what to do in an emergency.
  • Keep an eye on fellow workers.
  • "Easy does it" on your first days of work in the heat. You need to get used to it.

If workers are new to working in the heat or returning from more than a week off, and for all workers on the first day of a sudden heat wave, implement a work schedule to allow them to get used to the heat gradually. Working in full sunlight can increase heat index values by 15 degrees Fahrenheit. Keep this in mind and plan additional precautions for working in these conditions.

Remember these three simple words: Water, Rest, Shade. Taking these precautions can mean the difference between life and death.

Who is affected?

Any worker exposed to hot and humid conditions is at risk of heat illness, especially those doing heavy work tasks or using bulky protective clothing and equipment. Some workers might be at greater risk than others if they have not built up a tolerance to hot conditions, including new workers, temporary workers, or those returning to work after a week or more off. This also includes everyone during a heat wave.

Industries most affected by heat-related illness are: construction; trade, transportation and utilities; agriculture; building, grounds maintenance; landscaping services; and support activities for oil and gas operations.

About the Campaign

OSHA's nationwide Heat Illness Prevention Campaign aims to raise awareness and teach workers and employers about the dangers of working in hot weather and provide valuable resources to address these concerns. Begun in 2011, the Heat Illness Prevention Campaign has reached more than 10.7 million people and distributed close to half a million fact sheets, posters, quick cards, training guides and wallet cards. OSHA is again joining with other federal and state agencies and non-governmental organizations to spread the word about preventing heat illness. For example, OSHA is continuing its partnership with the National Oceanic and Atmospheric Administration’s (NOAA) National Weather Service to include worker safety precautions in their Excessive Heat Watch, Warning, and Advisory Products.

Available on this web page are numerous resources that can be used to prevent heat illnesses:

  • The Educational Resources section links to information about heat illnesses and how to prevent them. Many of these resources target vulnerable workers with limited English proficiency and/or low literacy.
  • The Using the Heat Index section provides guidance to employers to develop a heat illness prevention plan.
  • The Training section includes a guide/lesson plan for employers and others to use in instructing workers on heat illness. There are links to additional resources in other languages.
  • The Online Toolkit section includes news releases, public service announcements (PSAs), drop-in articles about heat illness prevention that you can customize to share and campaign artwork.
  • The Fatality Map is an interactive infographic representing heat-related fatalities that occurred outdoors between 2008 and 2014. It is not an exhaustive list of all worker fatalities from heat exposure. The map provides a geographic reminder that Water.Rest.Shade. are vital to providing a safe and healthful environment when working outdoors in the heat.

The Heat Illness web page and many resources are available en español.

We hope you will join with us in this effort by helping to reach workers and employers in your community with the resources you will find on this site.

Climate Change Preparedness and Resilience

Per Executive Order (EO) 13653, the impacts of climate change -- including an increase in prolonged periods of extreme temperatures, heavy downpours, an increase in wildfires, severe droughts, permafrost thawing, ocean acidification, and sea-level rise -- are already affecting communities, economies, and public health across the Nation. These impacts are often most significant for communities that already face economic or health-related challenges.  Managing these risks requires preparation, close cooperation, and coordinated planning by the Federal Government, as well as by stakeholders, to facilitate Federal, State, local, tribal, private-sector, and nonprofit-sector efforts to improve climate change preparedness and resilience.  These activities are designed to help safeguard our economy, infrastructure, environment, and natural resources; and provide for the continuity of executive department and agency operations, services, and programs.  The Department of Labor is actively engaged in the coordinated federal efforts to enhance climate change preparedness and resilience.

Highlights

Heat Safety Tool
Smartphone App

Heat Safety Tool - Smartphone App
Shows locations of outdoor worker, heat-related fatalities between 2008 and 2014.

Shows locations of outdoor worker, heat-related fatalities between 2008 and 2014.

Dr. David Michaels, Assistant Secretary of Labor for Occupational Safety and Health on the Campaign to Prevent Heat Illness

Dr. David Michaels, Assistant Secretary of Labor for Occupational Safety and Health on the Campaign to Prevent Heat Illness

June 10, 2015 - Speech to Meteorologists on Preventing Heat-Related Illness and Fatalities Among Outdoor Workers

E-Newsletter: 2013 OSHA Campaign to Prevent Heat Illness in Workers (PDF).

Ac·cli·ma·ti·za·tion

: a physical change that builds tolerance to the heat, can be done by gradually increasing workload for new and returning workers- and for everyone during a heat wave.

Drink water often - Rest in the shade - Report heat symptoms early - Know what to do in an emergency

OSHA is a Weather-Ready Nation Ambassador committed to working with NOAA and other Ambassadors to strengthen national preparedness for and resilience against extreme weather.

How can OSHA help? Workers have a right to a safe workplace. If you think your job is unsafe or you have questions, contact OSHA at 1-800-321-OSHA (6742). It's confidential. We can help. If you have been punished or discriminated against for using your rights, such as raising health and safety concerns or filing a complaint, you must file a complaint with OSHA within 30 days. No form is required, but you must call or send a letter to OSHA within 30 days of the alleged discrimination. For other valuable worker protection information, such as Workers' Rights, Employer Responsibilities, and other services OSHA offers, visit OSHA's Workers' page.

OSHA also provides help to employers. OSHA's On-site Consultation Program offers free and confidential advice to small and medium-sized businesses in all states across the country, with priority given to high-hazard worksites. For more information or for additional compliance assistance contact OSHA at 1-800-321-OSHA (6742). It's confidential. We can help.


*Accessibility Assistance: Contact OSHA's Directorate of Technical Support and Emergency Management at (202) 693-2300 for assistance accessing PDF materials.

All other documents, that are not PDF materials or formatted for the web, are available as Microsoft Office® formats and videos and are noted accordingly. If additional assistance is needed with reading, reviewing or accessing these documents or any figures and illustrations, please also contact OSHA's Directorate of Technical Support and Emergency Management at (202) 693-2300.

**eBooks - EPUB is the most common format for e-Books. If you use a Sony Reader, a Nook, or an iPad you can download the EPUB file format. If you use a Kindle, you can download the MOBI file format.

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