Redesigned Heat Safety Tool App Released May Help Letter Carriers

NALC/OSHA/NIOSH – 6/16/17 – The National Institute for Occupational Safety and Health (NIOSH) and Occupational Safety and Health Administration (OSHA) have collaborated to update OSHA’s original Heat Safety Tool app for smartphones.

The updated app, available for both Android and iPhone, provides a clearer user interface while still providing the same information to help keep employees safe when working outdoors in hot weather.

Extreme heat causes more deaths than any other weather-related hazard; each year more than 65,000 people seek medical treatment for extreme heat exposure.

Letter carriers who are exposed to hot and humid conditions can use the app to check the heat index and learn about the relevant protective measures. The app displays the heat index in the user’s location and shows the current risk level.

The app also forecasts the hourly heat index throughout the entire workday, giving employers information they can use to adjust the work environment as needed to protect workers.

Note: If you have the original OSHA app on your phone, it will no longer function after Sept. 30.

To download the updated app and get more information on OSHA’s efforts to help protect employees from the heat, visit OSHA’s heat campaign web page.


When you’re working in the heat, safety comes first. With the OSHA-NIOSH Heat Safety Tool, you have vital safety information available whenever and wherever you need it – right on your mobile phone.

The App allows workers and supervisors to calculate the heat index for their worksite, and, based on the heat index, displays a risk level to outdoor workers. Then, with a simple “click,” you can get reminders about the protective measures that should be taken at that risk level to protect workers from heat-related illness-reminders about drinking enough fluids, scheduling rest breaks, planning for and knowing what to do in an emergency, adjusting work operations, gradually building up the workload for new workers, training on heat illness signs and symptoms, and monitoring each other for signs and symptoms of heat-related illness.

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.

The OSHA-NIOSH Heat Tool is available in English and Spanish for Android and iPhone devices. To access the Spanish version, set the phone language to Spanish.

Stay informed and safe in the heat, check your risk level.

For more information about safety while working in the heat, see OSHA’s heat illness webpage, including online guidance about using the heat index to protect workers.

2 Responses to "Redesigned Heat Safety Tool App Released May Help Letter Carriers"

  1. dave   June 18, 2017 at 6:32 pm

    our trucks are saunas,80s outside 100+inside.boss says drink lots fluids,i do 62 and kidney troubles other issues,supe harasses when i comfort stop,once on route less then 500 feet from intersection of my route turn around, at a cvs.tells me to combine break,and or lunch. with comfort stop,i wont do it .i even go at cul de sac later in route that saves them travel time,we need a.c. in new trucks.i am a residential route with only a early opportunity to go to store.

  2. joker   June 20, 2017 at 3:10 pm

    Trucks are old and break down daily. WAY to HOT from spring thru fall. The only way to pay for trucks is to get rid of the 100,000 dead weight bosses, who do nothing. Even with all the lower paid new employees that get no benefits, the usps still can’t break even.

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