OSHA, NIOSH Release Redesigned Heat Safety Tool App

Published June 14, 2017

​Last week, NIOSH and OSHA released the redesigned, co-branded OSHA-NIOSH Heat Safety Tool app, which is intended to help users plan outdoor work activities based on how hot it feels throughout the day. The new version of the app replaces the one previously created by OSHA in 2011 and provides users with real-time heat index and hourly forecasts specific to their current geographical location. Based on the calculated heat index, the app also provides precautionary recommendations specific to heat index-associated risk levels that workers and managers can use to work safely outdoors. The recommendations in the newly released app have been updated to reflect information found in the NIOSH Criteria for a Recommended Standard: Occupational Exposure to Heat and Hot Environments, which the agency published in 2016 to address the hazards of heat and hot environments. An article in the April 2016 Synergist authored by Brenda Jacklitsch, MS, a health scientist with the NIOSH Education and Information Division, discusses NIOSH’s updated guidance on protecting workers in hot environments.

Other features of the app include editable location, temperature, and humidity controls for calculation of variable conditions and easy access to signs, symptoms, and first aid information for heat-related illnesses.

“Since workers in hot environments experience heat stress from a combination of environmental factors and metabolic heat from the tasks they are performing, OSHA modified some of the heat index cutoffs to create heat index-associated protective measure for worksites,” Jacklitsch explains in a blog post about the new app.

The OSHA-NIOSH Heat Safety Tool app is available to download for free in English and Spanish from both the Apple Store and Google Play.

To help prevent heat stress among workers, NIOSH encourages employers to implement engineering and work practice controls, train workers before hot outdoor work begins, and ensure that workers are acclimatized before they work in a hot environment. The agency also recommends that employers provide the means for appropriate hydration of workers and provide shaded areas to give workers the opportunity to limit exposure to direct sun or other radiant heat sources.

Visit NIOSH’s workplace safety and health topic page on heat stress for additional resources.