Can a generator get wet at all?

A running generator will survive weather it was placed in better than you'd think — engines are not delicate — but its outlets, control panel, and your plug connections should not be getting soaked. Water in the outlets risks tripping GFCI protection at best and shock or a short at worst. The generator itself can handle a storm from under a proper running cover; what it can't handle is sitting in pooled water or being drenched directly for hours.

Can I put a tarp over my generator while it runs?

No loose tarps, ever. A tarp draped over a running generator traps exhaust heat, can melt or ignite on contact with the muffler, starves the engine of cooling air, and creates a carbon monoxide pocket right where you'll be standing. If you want cover, use a purpose-built generator running cover — a framed, vented canopy designed to stay on while the machine operates, with the manufacturer's clearances respected. Never run one inside a box, a tent you improvised, or any homemade enclosure.

Is it safe to plug things in while it's raining?

With discipline, yes. Keep your hands dry when handling plugs, stand on dry ground (never in standing water), use the generator's GFCI-protected outlets and test them with the built-in button, keep plug junctions elevated off wet ground, and use outdoor-rated cords with drip loops so water runs off instead of into the connection. If a GFCI keeps tripping in the rain, don't defeat it — find the wet connection it's protecting you from.

Can I run my generator during a hurricane or severe storm?

During the worst of it, the honest answer is often no — and that's fine. Flying debris can wreck the machine and injure you, extreme wind defeats covers, and nobody should be outside tending a generator in dangerous conditions. Ride out the peak on flashlights and batteries, then start the generator when the storm passes and the real outage begins. The exception is a medical load that can't wait — which is exactly why medical backup planning should never depend on a portable generator alone.

How do I refuel a generator safely in bad weather?

Shut it down first, always — never refuel a running or hot generator, because gasoline vapor plus a hot muffler is a fire waiting for a spark. Let it cool several minutes, then refuel where it sits, outdoors, with the fuel can grounded on the ground beside it. Do not carry a hot or running generator under shelter to refuel it; that trades a fire risk for a carbon monoxide risk and keeps neither. Wipe spills, cap everything, and restart once you're clear.

Can You Run a Generator in the Rain? Safe Rules

Notice when generators get used: not on pleasant Tuesday afternoons, but in the middle of the weather that knocked the power out. Hurricanes, ice storms, nor'easters, summer downpours — the outage and the drenching arrive together, and the generator has to live outdoors in both. So "can I run it in the rain?" isn't a hypothetical. It's the operating condition.

Notice when generators get used: not on pleasant Tuesday afternoons, but in the middle of the weather that knocked the power out. Hurricanes, ice storms, nor’easters, summer downpours — the outage and the drenching arrive together, and the generator has to live outdoors in both. So “can I run it in the rain?” isn’t a hypothetical. It’s the operating condition.

The short answer is yes, generators run in rain all the time, all over the country, safely. The longer answer is that “safely” is doing real work in that sentence: three specific risks show up when water and generators mix, and each one has a specific rule. Here’s the whole picture.

What are the actual dangers — water, electricity, or exhaust?

All three, and they’re separate problems with separate fixes:

Electricity. A generator makes 120/240 volts and doesn’t know it’s raining. Wet hands, wet plugs, and standing water create paths to your body that dry conditions don’t. This is the electrocution and shock risk, and it’s managed with GFCI protection, dry-hand discipline, and keeping connections dry and elevated.

The machine. Water driven into the air intake, soaked outlets, and corrosion don’t usually kill a generator mid-storm — they kill it slowly, or trip its protection at the worst moment. This risk is managed with a running cover.

Exhaust. This is the one that actually kills people, and it’s a trap rain sets for you: the natural instinct when rain starts is to move the generator somewhere dry — the garage, the porch, under the carport. Every one of those moves converts a weather problem into a carbon monoxide emergency. The rain rules exist mostly to give you a safe outdoor option so you never make that trade.

Can you cover a running generator?

Yes — with a cover built for the job. Generator running covers (the framed canopy style sold for exactly this purpose) are designed to shed rain and snow while staying on during operation: they vent heat and exhaust out the sides, keep the required airflow, and hold themselves clear of the hot muffler.

Respect these rules with any cover:

Clearance is not optional. The generator needs air — for cooling and for combustion — and space around the exhaust. Follow the cover maker’s fit (they’re sized by generator frame) and the generator manual’s clearance specs, commonly several feet of open space around the unit for cooling.
Never improvise an enclosure. Plywood boxes, plastic storage bins, camping tents, and tarps-on-chairs all trap heat and exhaust gas, and several of them melt. If it wasn’t designed to have a running generator inside it, don’t put a running generator inside it.
The cover protects from above, not below. Place the generator on the highest, driest ground available — a slab, pavers, a sheet of plywood on grade — never in a low spot that ponds, and never anywhere floodwater can reach. Electricity and standing water do not negotiate.
Check it during the storm. Wind works covers loose. A quick look every few hours (when it’s safe to be outside) catches a shifted canopy before it becomes a tarp situation.

How do you handle cords and connections in the wet?

This is where most wet-weather injuries would happen, and the rules are simple enough to tape to the generator:

Dry hands for plugs. Every time. Dry them on the towel you keep by the door for exactly this.
Never stand in water to connect or disconnect anything. Move to dry ground or wait.
Use GFCI outlets — most modern generators have them on the 120V receptacles — and press the test button when you set up. A GFCI that trips in wet weather is information, not an annoyance.
Elevate every junction. Extension-cord connections should sit up on a brick, a bucket, or a hook — never lying in a puddle or wet grass. A drip loop (letting the cord dip below the plug before rising to it) keeps water from running down the cord into the connection.
Outdoor-rated cords only, in good shape — the same heavy-gauge guidance as always, with no nicks or cracked jackets. Water finds every flaw.
Rubber-soled shoes, dry gloves if you have them. Small things, real margin.

The cleanest wet-weather setup of all is a power inlet box with a transfer switch or interlock: one heavy cord from generator to wall inlet, no extension-cord junctions lying in the yard at all. The transfer switch versus interlock guide explains how both work.

Where should the generator sit during a storm?

Rain doesn’t change the placement law — it adds to it:

Still at least 20 feet from the house, exhaust pointed away. Wet weather is exactly when you’re tempted to cheat the distance “just this once.” Don’t. The distance and carbon monoxide guide explains why 20 feet is the floor in all weather.
High ground. Not the low corner of the yard that floods, not a basement window well area, never anywhere water pools.
Out of the debris path. Away from dead branches and anything the wind can deliver.
Reachable safely. You’ll check it, refuel it, and restart it in the dark and the wet. If reaching it means crossing a flooded section of yard, pick a different spot before the storm, not during.

What about standby generators in the rain?

They’re built for it. A standby unit lives outside permanently in a weatherproof, corrosion-resistant enclosure, starts itself, and shuts itself down — rain, snow, and storms are its design brief. Your jobs are minimal: keep the intake and exhaust clear of leaves, mulch, and snow; keep shrubs trimmed back to the manufacturer’s clearance; and after a long storm outage, glance at it for debris or damage before you forget about it for another season. The storm preparedness checklist has the pre-season routine that keeps one ready.

When should you shut it down?

Running through weather has limits. Shut the generator down (and leave it down until conditions change) when:

Water is rising toward it. A generator in floodwater is a loss and a hazard. Kill it while you still can, from dry ground.
The cover fails or blows off in conditions too rough to fix it safely.
You smell fuel, see damage, or hear it struggling — arcing, surging, or banging are stop-now sounds.
Conditions outside are dangerous for you. If stepping out means lightning nearby or debris flying, the generator waits. Power is replaceable; you aren’t.
It’s refuel time and you can’t do it safely. A hot generator plus gasoline plus rain gear and wet hands is a bad stack. Let it cool, take your time, or let it rest.

For planned refueling, remember the fuel math: a mid-size generator drinking half a gallon an hour through a two-day storm is a five-gallon-can problem every ten hours. The fuel consumption guide has the per-load numbers so you can plan cans instead of improvising.

How do you start and shut down a generator in wet weather?

The routine matters because the risky moments are the transitions — connections, startup, shutdown:

Setting up. Place the generator first, on its high, dry spot, 20 feet out, cover on, before you connect a single cord. Lay the cords, make the connections with dry hands, and plug into the generator last. At the house end, connections go indoors or into the inlet box — dry territory.

Starting. Keep one hand and your attention on the job: choke set, fuel valve open, switch on, pull or press start — then step back and let it settle into a steady run for a minute before you load it. Add loads one at a time, biggest first, rather than switching everything on at once in the rain.

Running checks. Every few hours, from a dry vantage when you can: is the cover seated, is anything pooling near it, is the fuel where you think it is? You’re looking for drift and surprises, not doing maintenance in a storm.

Shutting down. Unplug loads (or open the transfer switch) first, let the engine idle a minute to cool evenly, then shut it off and close the fuel valve. Don’t throw a cover or tarp over a hot generator “to keep it dry for next time” — it goes into storage dry and cool, or the cover waits until it is.

What does a wet season do to a generator over time?

Surviving one storm is easy. Surviving five storm seasons takes a little housekeeping, because water’s real damage is slow:

Corrosion finds the cheap metal first — fasteners, the fuel cap seal, the recoil starter, the outlet faces. A generator stored damp after a storm corrodes all winter. After the season’s last use, run it dry or stabilize the fuel, let the machine cool completely, and store it somewhere dry with the cover off until it’s fully moisture-free.
The air filter tells the truth. A filter that got soaked and dried in place can restrict airflow and cost you power exactly when the next storm arrives. They’re cheap; after a hard wet season, replace it instead of debating it. The full routine lives in the generator maintenance checklist.
Exercise runs are the vaccine. Twenty minutes under load every month or two keeps seals wet with oil (the right kind of wet), charges the battery, and — just as important — proves in calm weather that the machine still starts. The generator that fails in a hurricane is almost always the one nobody touched for fourteen months.

What about medical equipment during a storm outage?

If someone in the house depends on powered medical equipment, a storm outage is the scenario to plan hardest — because the peak of the storm is precisely when you may not be able to run a portable generator at all. The resilient setup is layered: a power station carries the device silently through the worst hours (indoor-safe, no weather exposure), and the generator takes over for the long tail once conditions allow, recharging the station between runs. The guides on backup power for an oxygen concentrator and backup power for a CPAP machine work through the runtime math for the two most common devices.

The bottom line

Rain is not a reason to move a generator closer, cover it with whatever’s handy, or handle plugs carelessly — and it’s not a reason to go without power, either. Put it 20 feet out on high ground, under a proper running cover, with GFCI outlets, dry hands, and elevated connections, and a generator does its storm job the way thousands of them do every year. Respect the three risks — shock, machine, exhaust — and the weather becomes an inconvenience instead of an emergency.