As temperatures rise across the country, heat illness remains one of the most preventable hazards faced by Postal Service™ employees. Whether working indoors or outdoors, in humid regions or dry climates, all employees can be affected by heat. Hydration is one of the simplest and most effective ways to reduce risk.
The cover photo for this issue highlights a critical safety practice: drinking water frequently throughout the workday. Hydration supports the body’s ability to regulate temperature, replace fluids lost through sweating, and maintain essential physical and cognitive function. Even moderate temperatures can create dangerous conditions when combined with physical activity, sun exposure, or inadequate fluid intake.
Heat illness can develop quickly, and it does not discriminate by job type, location, or experience level. Early symptoms may include:
n Thirst.
n Fatigue.
n Dizziness or lightheadedness.
n Headache.
n Muscle cramps.
If untreated, these symptoms can progress to heat exhaustion or heat stroke, both of which require immediate intervention.
n Drink water frequently, not just when you feel thirsty.
n Start hydrating before your shift and continue throughout the day.
n Avoid energy drinks and excessive caffeine, which can contribute to dehydration.
n Take authorized breaks to cool down and recover as needed.
n Use available cooling resources at your facility, such as ice, water, shade, and heat illness prevention program materials.
Preventing heat related illness requires shared responsibility across all levels of the organization. Supervisors and employees work together by:
n Ensuring water and ice are readily available and accessible throughout the day.
n Drinking water regularly, even before feeling thirsty.
n Monitoring themselves and coworkers for signs of heat stress and reporting symptoms early.
n Encouraging and taking authorized breaks when needed to prevent overheating.
n Following heat illness prevention guidance provided during stand up talks, training, and safety communications.
n Wearing appropriate clothing and PPE that supports heat dissipation and comfort.
n Speaking up if conditions become unsafe or if additional cooling measures are needed.
Heat affects everyone, carriers, clerks, mail handlers, custodians, vehicle operators, and administrative staff. The Postal Service’s commitment to employee safety includes ensuring all employees understand the risks and taking proactive steps to stay safe. By making hydration a daily priority, every employee can take an active role in preventing heat related illnesses and supporting a safer workplace.
— Occupational Safety and Health,
Human Resources, 7-9-26
