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No OSHA Lightning Standard: Writing a Weather Stop-Work Policy That Holds Up

OSHA has no lightning standard. The exposure sits in how you handle the worker who stops for thunder, and in what your written weather plan actually says.

by iSi Environmental

Search for the OSHA lightning rule and you will not find one. There is no lightning standard in 29 CFR, and no federal requirement that an employer write a weather stop-work policy at all. OSHA’s lightning document is a joint fact sheet with NOAA, and its operative verb is “should.”

The exposure sits in the first few minutes after a worker says the storm is too close and stops working.

On October 1, 2026, OSHA announced findings against Union Pacific Railroad Co. in a case that began that way. OSHA news release 26-1252-KAN describes a worker at the North Little Rock, Arkansas yard who “notified management of nearby lightning and federal safety standards” and “refused to work until the storm passed.” OSHA found that within minutes the railroad “removed the employee from service and was later charged with insubordination.”

Rail retaliation has its own statutory pattern, covered in OSHA’s 25-statute whistleblower program. The policy question underneath this one case reaches any employer with people working outdoors.

What did OSHA order in the Union Pacific lightning case?

OSHA’s June 10, 2026 order directs back wages, lost benefits, compensatory and punitive damages “totaling at least $304,869,” plus attorney’s fees, over a May 30, 2024 termination at the North Little Rock yard (release 26-1252-KAN, October 1, 2026). The order is not final: Union Pacific filed objections and requested a hearing before a U.S. Department of Labor Administrative Law Judge.

“At least” makes the figure a floor, and the order is under challenge, so no tribunal has decided the merits. The sequence and the clock are what matter here: termination May 30, 2024, order June 10, 2026, more than two years to reach a document that is still not the last word.

One news release establishes no enforcement trend, and no general duty clause citation for a lightning hazard turned up in the primary sources reviewed here.

Does OSHA have a lightning safety standard?

No. OSHA has no lightning standard. Its guidance is a joint OSHA/NOAA fact sheet, DTSEM FS-3863 (06/2021), which says employers “should have a written Emergency Action Plan.” Enforcement, where it happens, runs through the general duty clause at 29 U.S.C. 654(a)(1), which the fact sheet paraphrases as the requirement to provide a workplace “free from recognizable hazards.”

The gap between “should” and “must” is the whole regulatory picture. OSHA recommends a written plan and no standard commands one. The general duty clause reaches a recognized hazard an employer left unaddressed, and a thunderstorm over an exposed crew qualifies as recognized in any industry that works outside.

There is no small-business exemption from the general duty clause, and no headcount below which a weather hazard stops counting.

Does any OSHA standard require stopping work in dangerous weather?

One does, narrowly. 29 CFR 1926.1431(k)(8)(ii) provides that for hoisting personnel, “a qualified person must determine if, in light of indications of dangerous weather conditions, or other impending or existing danger, it is not safe to lift personnel.” It names no threshold, no distance and no wait time.

That “must” is real and it is scoped to personnel platform lifts. Reading it as a broad weather-stop requirement will not survive contact with the regulation. The paragraph delegates the judgment and requires a qualified person to make it. If your crews lift personnel, the policy needs a name or a role filling that slot on every shift.

How long should work stay stopped after thunder?

At least 30 minutes after the last sound of thunder, per OSHA/NOAA FS-3863: “Remain in the shelter for at least 30 minutes after hearing the last sound of thunder.” The clock restarts with each new thunderclap. The same 30 minutes applies whether workers shelter in a substantial building or a fully enclosed metal-topped vehicle.

Two things that commonly get attached to that number are not in the fact sheet. FS-3863 states no “30/30 rule” and gives no distance figure at all. Writing a mileage trigger into your policy and crediting it to OSHA will not hold up if anyone checks.

The trigger FS-3863 does name is sensory: take action “after hearing thunder, seeing lightning, or perceiving any other warning signs.” A radar app is a useful input and a poor policy trigger, since it leaves the call to whoever holds the phone.

What has to be in a written weather stop-work plan?

Six elements per OSHA/NOAA FS-3863: instruct supervisors and workers to act on thunder, lightning or other warning signs; state how warnings reach workers; identify safe shelter locations and requirements; state the response time needed for workers to reach shelter; specify how suspension and resumption of work are decided; and account for evacuation time for customers and the public.

The response-time element is the one most written plans leave out, and the one that changes behavior. If the nearest substantial shelter is six minutes away on foot, the stop has to be called before the storm is six minutes out. A plan that lists shelters without listing travel times tells a crew where to go and nothing about when to leave.

The practical test is whether a worker can be more than a short walk from a substantial building or a fully enclosed metal-topped vehicle when thunder is first heard. That takes in rail yards and track work, crane and personnel-platform operations, line crews, agriculture and grain handling, roofing and tower work, grounds crews, tank farms and outdoor process units, intermodal ramps, and anyone on an aerial lift or open equipment.

Ten items to audit your own policy against

  1. Write the plan down. FS-3863 says employers “should have a written Emergency Action Plan.” An unwritten practice is unprovable after the fact, to an inspector or to a former employee’s lawyer.
  2. Name the trigger in observable terms. First thunder or first visible lightning, in the policy text, so nobody has to interpret a radar image under time pressure.
  3. State the resume rule as a hard number. At least 30 minutes after the last thunder, restarting on each new thunderclap.
  4. Identify shelters and compute travel time. Locations and requirements for safe shelters, plus the response time needed for every worker to reach one from the farthest point they work.
  5. Say how the warning reaches people. Name the mechanism: radio call, yard siren, phone alert, designated spotter.
  6. Grant stop authority explicitly, by name or by role, with no retaliation and no permission required. This clause is what turns the document into protection.
  7. Specify when work resumes and who decides. FS-3863 asks the plan to “specify approaches for determining when to suspend outdoor work activities, and when to resume.”
  8. For personnel hoisting, assign the qualified person. 1926.1431(k)(8)(ii) requires a qualified person to make the dangerous-weather determination. Put a name against each shift.
  9. Account for the public. The fact sheet asks employers to account for evacuation time for customers and the public, which matters on any site with visitors, deliveries or pedestrians next door.
  10. Train on it and document the training. A stop-work right nobody has been told about in writing does not get exercised.

Tornado sheltering runs on different criteria, covered in our severe weather and tornado guidance. A lightning stop and a tornado warning should not share one paragraph in your plan.

Who should have authority to stop work for weather?

Every exposed worker should hold it, supervisors included, and the policy should say so in writing with no requirement to ask permission first. The Union Pacific finding turned on the opposite arrangement: OSHA found the employee was removed from service within minutes of refusing to work and later charged with insubordination.

Stop authority written as a supervisor privilege fails in the exact conditions it exists for. The crew member standing on the ballast hears the thunder first, and a rule that sends that person looking for a foreman two tracks over has already spent the margin.

The wording that carries the weight covers who may call the stop, that no approval is needed before leaving, and that nobody will be disciplined or reassigned for calling one. Leave out that last piece and the rest is decoration.

Is an employee protected if they refuse to work during a lightning storm?

Under 29 CFR 1977.12(b)(2), a good-faith refusal is protected where a reasonable person would conclude there is “a real danger of death or serious injury,” there is “insufficient time… to eliminate the danger through resort to regular statutory enforcement channels,” no reasonable alternative exists, and the employee has, where possible, sought and failed to obtain a correction from the employer.

Railroads sit under a second test. 49 U.S.C. 20109 protects a refusal made in good faith with no reasonable alternative, where a reasonable person would find an “imminent danger of death or serious injury,” where urgency precludes eliminating the danger another way, and where the employee notifies the railroad of both the condition and the intention to stop work. The FRSA caps punitive damages at $250,000.

Notice what the employee has to do under both tests. The protection attaches to a worker who raised the condition before walking away, which is what a well-written policy tells people to do anyway.

How many days does a worker have to file a retaliation complaint?

It depends on the statute, and the spread is wide. OSH Act section 11(c) gives 30 days from the violation, per 29 U.S.C. 660(c)(2). The Federal Railroad Safety Act gives 180 days under 49 U.S.C. 20109. A worker who misses the 30-day OSHA window may still be inside a longer sector-specific window.

These two deadlines are the only clocks on this subject, and both run against the worker. No lightning rule is taking effect, and there is no phase-in, registration or annual filing tied to weather planning. The employer side is a standing exposure with no date attached, which is why it sits unaddressed in so many programs.

How long does an OSHA retaliation investigation actually take?

Far longer than the statute contemplates. A Department of Labor Inspector General audit (report 02-21-001-10-105, November 23, 2020) found that 88 percent of sampled whistleblower cases exceeded statutory investigation timeframes, by an average of 634 days, and that 96 percent did not meet all essential elements of a complete investigation.

The Union Pacific timeline fits: a May 2024 termination reaching a June 2026 order now headed to an ALJ.

For a worker, the complaint process is a slow and uncertain remedy. For an employer, the slowness brings no relief, because the exposure stays open on the books for years and the eventual number can be large. A written policy settles it in advance, at a cost of one afternoon of program work.

What can a company be fined over a weather hazard?

Through the general duty clause, up to $16,550 per serious violation and $165,514 per willful or repeated violation, with failure to abate running at $16,550 per day. These are the 2026 figures and they are unchanged from 2025, because the required October 2025 CPI-U data was never produced.

The OSHA penalty memorandum of May 21, 2026 explains the freeze, citing OMB Memorandum M-26-11: “the Bureau of Labor Statistics was unable to produce the required October 2025 CPI-U data due to the government shutdown,” and because the statute mandates the October CPI figure with no alternative method, “the annual civil monetary penalties cost-of-living adjustment cannot be made this year.”

Penalty math is the wrong instrument for sizing this risk: the largest documented dollar figure attached to a lightning stop-work dispute came out of the whistleblower channel, and it exceeds the maximum penalty for a single willful violation.

Are Kansas, Missouri, Oklahoma and Nebraska employers under federal OSHA or a state plan?

Federal OSHA. None of the four operates an OSHA-approved State Plan, so private sector employers there answer to federal OSHA directly. Iowa, also inside OSHA’s Region 7 footprint, is a State Plan state covering both private and public sector employers. Twenty-two jurisdictions nationally run State Plans that cover private employers (OSHA State Plans).

Texas and Colorado have no State Plan either, which puts the regional footprint except Iowa under federal jurisdiction for private employers. An Iowa employer answers to Iowa OSHA, which must be at least as effective as federal OSHA and may add its own requirements.

This gets stated backwards often enough to matter. Missouri has no State Plan. No state-specific lightning or severe-weather stop-work regulation was located in any of the six non-Plan states named here, so there is nothing to lay out state against state.

Are city and county outdoor crews covered by OSHA?

Not by federal OSHA in a non-State-Plan state. OSHA states that where no State Plan exists, federal OSHA “covers most private sector workers within the state. State and local government workers are not covered by federal OSHA.” A municipal utility, county road department or city line crew in Kansas, Missouri, Nebraska or Oklahoma therefore adopts a weather stop policy as a management decision.

That changes the argument rather than removing it. A public employer in those states faces no federal weather-stop exposure, which moves the case for a written policy from compliance over to liability and retention. Iowa public employers are in a different position, since the Iowa State Plan covers public sector workers.

Where to start

Pull your emergency action plan and read it against the ten items above. The two gaps that show up most often here are the missing travel-time figure and the missing sentence granting stop authority to the worker who hears the thunder. Both close in an afternoon while the sky is clear, and the second is what a plaintiff’s counsel asks for first.

iSi develops and reviews written EHS programs, including emergency action plans and the stop-work language inside them, and our safety audits test whether what the binder says matches what crews do when weather moves in. If your weather plan has not been read since the day it was written, start there. Our safety consulting group handles the program work, and you can talk to a consultant.

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