Heat safety for Jacksonville crews: a guide for employers

Jacksonville heat is not just about the temperature. Humidity off the Atlantic and the St. Johns River makes it harder for sweat to cool the body. Warm weather arrives early in the spring and often lasts well into the fall. Nights can stay warm, so workers do not always recover before the next shift.

This guide is for employers who run warehouse, construction, environmental services and skilled trades crews in Northeast Florida. It covers water, rest and shade, and how to bring new workers up to speed safely. It also explains how to spot heat illness, what to do, and how to train contract workers on day one. It ends with tips you can share with your crew. It describes OSHA's heat guidance in general terms. For your specific site, read OSHA's materials directly and talk with your safety advisor.

Why heat deserves a real plan in Northeast Florida

Heat illness can come on quickly, and it can be fatal. It is also preventable. Employers are responsible for protecting workers from recognized hazards, and OSHA's guidance treats heat as a serious workplace hazard. A written plan turns good intentions into habits that supervisors follow every day.

In Jacksonville, heat risk shows up in places people do not always expect. A large distribution center on the Westside or near the airport can trap heat under the roof, especially near dock doors and upper racking. A construction site in St. Johns or Clay County may offer little shade. An environmental services crew may work in heavy protective gear on a hot afternoon. A trades worker may spend the day in a roof or an attic.

Watch the heat index, not just the thermometer. The heat index combines temperature and humidity to show how hot it feels to the body. The National Weather Service office in Jacksonville issues heat advisories when conditions are dangerous. Build those alerts into your daily planning.

OSHA and NIOSH offer a free Heat Safety Tool app that shows the heat index for your location and suggests protective steps. Supervisors can check it at the start of each shift. It is a simple way to make heat part of the daily routine.

Water, rest and shade: the basics

OSHA's heat safety message comes down to three words: water, rest and shade. They sound simple. They only work when the site makes them easy to use.

Put cool, clean drinking water close to where people work, not only in the break room. Encourage workers to drink small amounts often, even before they feel thirsty. Waiting until thirst sets in means the body is already behind. Electrolyte drinks can help during long, heavy sweating, but water should be the main source.

Plan rest breaks in a shaded or cooled area. A canopy, a tent, an air-conditioned trailer or a cool break room all work. The hotter the conditions and the heavier the work, the more often people need to rest. Make it clear that anyone who feels unwell can stop and cool down without trouble from a supervisor.

Supervisors set the tone. If a lead takes breaks and drinks water, the crew will too. If a lead treats breaks as a sign of weakness, workers will push past the warning signs. Talk with supervisors about this directly, and check that breaks actually happen on hot days.

Acclimatizing new workers in their first days

New workers face higher risk. Their bodies have not yet adjusted to working hard in the heat. OSHA's guidance points out that new and returning workers are especially vulnerable in their first days on the job. This applies to contract workers who start at your site, even if they have worked in heat elsewhere.

Acclimatization means building up heat exposure gradually, usually over a week or two. A worker who starts on Monday should not be given the hottest, heaviest job for a full shift. Start with shorter stretches in the heat, more frequent breaks and lighter tasks, then add more each day.

Workers who return after time away also lose some of their tolerance. That includes people coming back from vacation, illness or a few weeks at a cooler site. Treat them like new workers for a few days. The same is true when a sudden heat wave arrives and everyone's tolerance is tested at once.

• Give new and returning workers shorter stretches in the heat during their first days.
• Pair new workers with an experienced coworker who can watch for warning signs.
• Save the heaviest, hottest tasks until workers have had time to adjust.
• Check in with new workers several times during each shift in their first week.
• Tell your staffing partner which roles involve heat, so workers know before they start.

Recognizing the signs of heat illness

Every worker and supervisor should know the warning signs. Heat illness often starts small and gets worse fast. People who are getting sick may not notice it themselves, so coworkers need to watch out for each other.

Heat rash and heat cramps are early signs that the body is under stress. Heat rash looks like red bumps on the skin. Heat cramps are painful muscle spasms, often in the legs, arms or stomach. Both are reasons to rest, cool down and drink water.

Heat exhaustion is more serious. Signs include heavy sweating, cool and clammy skin, headache, dizziness, nausea, weakness, strong thirst and irritability. A worker with heat exhaustion needs to stop work and cool down right away. If they do not improve quickly, or if they get worse, get medical help.

Heat stroke is a medical emergency. Signs include confusion, slurred speech, fainting, seizures and very hot skin that may be dry or still sweating. The person may act strangely or not make sense. Call 911 immediately. Heat stroke can cause lasting harm or death without fast treatment.

What to do when someone gets sick

Have a plan before anyone needs it. Every supervisor should know where the nearest cool area is, how to call for help and what address to give 911. Large sites need extra care, such as a warehouse at Cecil Commerce Center or a new subdivision under construction. Make sure emergency crews can easily find the address and the right gate.

Never leave a worker with heat symptoms alone, and never send them home by themselves. Heat illness can get worse after someone leaves the site. Assign a coworker to stay with them until they recover or until help arrives.

After any heat illness, review what happened. Was water close enough? Were breaks happening? Was the worker new to the job? Use what you learn to adjust the plan. For contract workers, report the incident to your staffing partner right away, since the agency is the employer of record and carries workers' compensation.

• For signs of heat stroke, call 911 right away.
• Move the worker to shade or a cool area while you wait.
• Cool them quickly with cold water, wet cloths, ice packs or a fan.
• Loosen or remove heavy outer clothing and gear.
• Give water only if they are alert and able to drink.
• Stay with the worker until medical help arrives or they have clearly recovered.

Schedules that work with the heat

Many Jacksonville crews already start early. Use those cooler morning hours for the heaviest work. Save lighter tasks, paperwork and indoor jobs for the hottest part of the afternoon when you can.

Rotate workers between hot and cooler tasks. On a dock, that may mean switching people between trailer unloading and staging inside. On a construction site, it may mean trading off between work in direct sun and work in the shade. Rotation spreads the load and gives each person regular recovery time.

Afternoon thunderstorms are common in Northeast Florida during the hottest months. They bring lightning, which is its own outdoor hazard. Build both heat and lightning into your daily plan, with a clear rule for when crews come inside.

Plan ahead for heat advisories. Decide in advance how your schedule will change: earlier starts, longer breaks, fewer people on the hottest tasks. Share those plans with your staffing partner, so contract workers hear about changes from both you and their recruiter.

PPE and the heat: managing the trade-offs

Protective gear keeps workers safe from other hazards, but it can also trap heat. Hard hats, high-visibility vests, gloves, long sleeves, coveralls and respirators all add to heat stress. Environmental services crews may wear chemical-resistant suits that hold heat in.

Never solve heat by removing required PPE. Instead, plan around it. Choose lighter, breathable versions where they provide the same protection. Look at cooling vests, neck wraps and hard hat shades where they fit the job. Light-colored clothing can help outdoors.

When heavy PPE is required, adjust the work. Shorten stretches in the gear, add breaks, and give people a cool place to take the gear off during rest. Watch workers in heavy gear more closely, because their bodies are working harder to stay cool.

Heat by industry: warehouse, construction, environmental and trades

Warehouse and distribution: heat often builds near dock doors, inside trailers and high in the building. Use fans, open doors where it is safe, and limit time inside hot trailers. Watch forklift operators too, since sitting still does not mean they are cool.

Construction: shade is often scarce on new sites in growing areas of St. Johns, Clay and Nassau counties. Bring shade with you, in the form of canopies or a cooled trailer. Place water stations near each work area as the site changes.

Environmental services: crews often combine outdoor work, physical effort and protective gear. Plan for frequent breaks and close supervision. Early starts help, but the heat can still build by mid-morning.

Skilled trades: roofers, electricians, HVAC technicians and others may work in attics, on roofs or in mechanical rooms with little airflow. Limit time in those spaces, use fans where possible, and make sure no one works alone in extreme heat.

Training contract workers on day one

Contract workers are often new to your site, your supervisors and your heat conditions. That makes the first day important. Cover heat safety in your site orientation, in plain language, before anyone starts work.

Show workers where the water, shade and cool areas are. Explain how breaks work and who to tell if they feel unwell. Teach the signs of heat illness and what to do in an emergency. If your crew includes Spanish speakers, give the training in Spanish too.

Work with your staffing partner on this. Tell your recruiter which roles involve heat, which PPE is required and how your site handles breaks. A good partner can preview those conditions with workers before day one, so they arrive ready. All Purpose Staffing is headquartered on Baymeadows Road and places contract, contract-to-hire and direct hire workers across Northeast Florida. Our recruiters stay in touch after placement, which helps us hear about problems early.

Tips you can share with your workers

Many employers post a short list like this in the break room or include it in a pre-shift talk. Adapt it to your site and your crew. Keep it simple, and repeat it often during hot weather.

• Drink water often during your shift, even if you do not feel thirsty.
• Take your breaks in the shade or a cool area, and do not skip them.
• Wear light, breathable clothing under your required PPE.
• Eat a light meal and get enough sleep before your shift.
• Know the signs of heat illness, and tell your supervisor if you feel dizzy, sick or confused.
• Watch your coworkers, and speak up if someone seems off.
• If you are new or coming back from time off, take it slower in your first days.
• If someone shows signs of heat stroke, call 911 and help cool them down.

Common questions

Related pages

• Request workers
• Contract worker safety checklist
• Hurricane readiness for employers
• Construction staffing
• Warehouse staffing in Jacksonville
• On-site staffing