The Rutgers NJAES factsheet on “Preventing Heat Stress in Agriculture” has been updated and is now available at https://njaes.rutgers.edu/FS747/. The factsheet provides basic knowledge about heat stress, first-aid treatment, and preventative measures that are important to both agricultural employers and workers. As the temperatures warm up, it’s time to get prepared for working in the heat!
Beat the Heat: Recognize Signs of Heat Illness
Several types of heat-related illnesses can affect workers and symptoms may be non-specific. When a worker is performing physical labor in warm environments, any unusual symptom may be a sign of heat illness. The chart below from OSHA outlines symptoms and signs that may indicate heat stress. Note that common signs and symptoms include muscle pain, weakness or fatigue, dizziness, heavy sweating, and rapid heart rate.
Heat-Related Illness |
Symptoms and Signs |
Heat stroke |
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Heat exhaustion |
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Heat cramps |
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Heat syncope |
|
Heat rash |
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Rhabdomyolysis (muscle breakdown) |
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Employers and workers should become aware of symptoms related to heat stress and heat illness. In addition, knowing what to do when someone is showing signs of heat illness is very important. This resource from NIOSH describes the appropriate first aid for each of these illnesses. Prompt action to provide first aid can make a difference in recovery of persons with heat illness. Multiple heat-related illnesses can occur together, and time is of the essence.
When in doubt, place the worker in a cool environment and call 911.
Beat the Heat: Hydration is Key
The body uses water to help dissipate heat through sweat and evaporation of sweat. Water lost as sweat must be replaced through water consumption to help the body maintain temperature regulation. During moderate activity, the CDC recommends drinking at least 1 cup of water every 15-20 minutes to replace water lost through sweat.
Sports drinks are likely unnecessary to replenish the body’s electrolytes when adequate hydration is combined with regular meals. However, sports drinks may be beneficial to help balance the body’s water and electrolytes when tasks conducted under hot temperatures result in prolonged sweating over several hours.
Limit consumption of energy drinks, alcohol, and caffeine-containing beverages such as coffee, tea, and soda. These beverages can contribute to dehydration, increasing the risk of heat illness.
Staying hydrated starts before work then continues throughout the day and after work. Attention to personal hydration decreases the risk of heat illness and other risks associated with chronic dehydration, such as kidney stones.
Webinars: Don’t Sweat Heat Stress in Agriculture
The New Jersey Legislature is currently reviewing identical bills (A3521/S2422) which would establish an occupational heat stress standard and “Occupational Heat-Related Illness and Injury Prevention Program” under the NJ Department of Labor and Workforce Development. As we monitor the progress of these bills, the Farm Health and Safety Working Group of Rutgers Cooperative Extension has launched an educational program on heat stress mitigation in agriculture which includes weekly “Beat the Heat” articles published in the Rutgers Plant and Pest Advisory E-Newsletter, an update to the Rutgers factsheet “Preventing Heat Stress in Agriculture” and a webinar series.

USDA photo by Preston Keres.
In partnership with New Jersey Farm Bureau, we invite you to join us for a two-part webinar series titled “Don’t Sweat Heat Stress in Agriculture”.
- Wednesday, June 5 from 7:00-8:00 PM
- An introduction to heat stress issues in agriculture. We will also share tools farmers can use to evaluate heat risk and recommended resources for guidance on heat stress prevention.
- Wednesday, June 12 from 7:00-8:00 PM
- An overview on signs of heat stress and corresponding first aid, as well as strategies for heat stress prevention. A panel of farmers will discuss their currently used strategies for employee management during periods of high heat.
You must register to attend these webinars by visiting https://go.rutgers.edu/heat-stress-in-ag.
Questions? Contact Kate Brown, County ANR Agent with RCE-Somerset County, at 908-526-6293 x4 or kbrown@njaes.rutgers.edu.
Beat the Heat: Tools for Evaluating Heat Risk

Heat safety tool phone app created by OSHA and NIOSH.
As the weather warms up, prepare yourself to evaluate the heat risk for outdoor tasks. We often use a weather application on our phone to check the daily high and low temperature, but air temperature alone is not sufficient to evaluate heat risk. Heat index is a more appropriate measurement because it combines the effects of air temperature and humidity to indicate the level of discomfort felt by the average person.
One easy way to check the heat index is the Heat Safety Tool phone app (see photo) developed by the Occupational Safety and Health Administration (OSHA) and the National Institute for Occupational Safety and Health (NIOSH). The app calculates heat index at your specific site and displays the risk level to outdoor workers. It also provides insight into protective measures for the given risk level. This mobile phone app is available for both Android and iPhone.
A similar, web-based tool is the HeatRisk website created by the U.S. Centers for Disease Control and Prevention (CDC). The HeatRisk homepage has a color-coded map to indicate today’s heat risk (no risk to extreme risk) for each county in the U.S. You can also enter your zip code to get the daily and 5-day forecasted heat risk for your site plus corresponding actions to reduce heat-related health risks.
Stay tuned for weekly posts on how beat the heat this summer!
Take a quick survey to help with Field Equipment Sanitation Research!
In a Specialty Crop Research Initiative (SCRI) grant designed to guide future solution and resources centered around field equipment sanitation, collaborative team comprising pathologists, weed scientists, agronomists, and experts in agricultural equipment sanitation has crafted a questionnaire. This questionnaire is designed to gather growers’ input on their current practices and determine the necessity for implementing new ones.
The research will develop a more comprehensive understanding of the challenges associated with field equipment sanitation and work toward developing solutions that are effective, implementable and sustainable.
To introduce the survey and forthcoming research effort, Dr. Matt Grieshop, lead PI on this project indicates that “We are a group of agricultural research and extension professionals from across the United States that are curious about grower and agricultural professional perceptions about the importance of field equipment sanitation to mitigate the spread of organisms that pose human health, weed, plant pathogen or other risks.
Agricultural field equipment includes tillage implements, tractors, harvesters, cultivation equipment, trucks, trailers, sprayers, mowers, or any other piece of equipment that is shared across fields.
This information will be solely used to help frame future research questions and outreach activities. It will not be published or distributed in any form. Answering should take 5 minutes or less and is completely voluntary and anonymous.
Your participation is invaluable to future developments in the industry regarding food safety and equipment sanitation. We need more inputs from New Jersey specialty crops growers so that they have a say on the direction that field equipment sanitation research will take in the future!
To contribute, visit here or scan the QR code below.
If you have questions, comments or concerns contact Dr. Matt Grieshop at mgriesho@calpoly.edu or Dr. Thierry Besancon at thierry.besancon@rutgers.edu.