Hurricane Propane Prep: What to Do Before the Cone Points at You

The propane shortage during a hurricane doesn't happen when the storm hits. It happens 48 hours before, when every station within a hundred miles has a line around the block and the trucks can't restock fast enough.

By then your options are gone. Everything useful about propane preparedness happens earlier, and most of it happens before the season starts at all.

The timeline that actually works

Before the season (May–June). Get your permanent tank topped off and keep it there. Verify cylinder recertification dates. Test the generator under load — not just a start-and-idle, an actual thirty minutes with real appliances connected. Replace regulators older than about fifteen years and hoses showing any cracking. Confirm your CO alarms work.

When a storm enters the basin (5–7 days out). Check your tank percentage and schedule a delivery if you're below 70%. This is the last comfortable window. Suppliers are still running normal routes and you're ahead of the panic.

When the cone includes you (3–5 days out). Fill or swap all portable cylinders now. Confirm the generator runs. Buy or verify you have the adapters, hoses, and extension cords you'll need — those sell out before the fuel does.

48 hours out. Secure everything physical. Do not plan on buying anything at this point. Stations are stripped and lines are long.

24 hours out. Final check on connections, tank valves, and securing. Then stop.

The pattern that leaves people stranded is treating fuel as a two-days-out errand. Propane is the item to handle first, not last, because the resupply chain is slower than the one for water and batteries.

How much you actually need

Anchor it to a duration, not a feeling. Multi-day outages are the norm after a significant landfall — five to ten days is common, and rural feeders can run longer.

If you're running a generator, that dominates everything else. A mid-size unit under household load burns roughly 1.0 to 1.5 gallons per hour, which is 24 to 36 gallons a day. Seven days is 170 to 250 gallons. That's a 250 or 320 gallon tank, not a stack of cylinders.

Air conditioning is the swing variable in hurricane climates. A household running central air during recovery can double its consumption compared to one running only refrigeration and fans. Deciding in advance whether AC is part of your plan changes your fuel math more than any other single choice.

If you're only cooking and running a grill or camp stove, the numbers are far smaller — a 20 lb cylinder covers a week of cooking easily. Two gives you comfortable margin.

The full consumption breakdown by generator size depends on your unit's rated load and runtime hours — check your generator's manual for its specific propane consumption rate.

Securing tanks against wind and water

This is the part people skip, and it causes real damage.

Permanent tanks. A 500 gallon tank that's nearly empty can float. Storm surge and flooding have carried tanks off their pads, snapping the gas line on the way out. Keeping the tank fuller adds weight and reduces buoyancy, which is one more argument for filling early. In flood-prone areas, tanks should be anchored to a concrete pad with the straps and hardware your supplier specifies — this is not a DIY improvisation.

Cylinders. Store them upright, outdoors, secured so they can't tip or roll. A loose 20 lb cylinder in hurricane winds is a projectile. Strap them to a fixed structure on the lee side of the house, away from windows.

Never bring cylinders inside. Not into the garage, not into a shed attached to the house, not into the laundry room. Propane vapor is heavier than air and pools at floor level, and a leak in an enclosed space is how you get an explosion. This rule doesn't relax because there's a storm coming.

Shut the valve. If evacuation is likely or flooding is possible, close the service valve on your permanent tank and the valves on all cylinders. Your supplier can advise on your specific installation.

During the outage

Run the generator outdoors, well away from the house, with exhaust pointed away from every window and door. Carbon monoxide poisoning kills people after storms with grim regularity, and the victims are usually people who thought partial ventilation was sufficient. An open garage door is not ventilation.

Grills, camp stoves, and turkey fryers stay outside. Every year, someone brings a grill into a garage during a storm and it goes badly.

Don't use a propane cooktop or oven to heat a room. Beyond the CO risk, it dumps water vapor into a house that's already dealing with humidity.

Keep the refrigerator and freezer closed as much as possible — a full freezer holds temperature for roughly 48 hours unopened, which stretches your generator fuel considerably if you're disciplined about it.

Before you relight anything

If your tank or appliances were submerged, flooded, or in any way underwater, stop. Do not attempt to relight.

Flooded regulators and controls have to be replaced, not dried out. Water contamination inside a regulator can cause it to fail in ways that aren't visible from outside. Appliance gas valves and controls that have been submerged are the same. This is a qualified technician's job, and most propane suppliers have a post-storm inspection process specifically for it.

Same rule if the tank shifted, the line was strained, or you smell gas anywhere. Leave the area, don't operate switches or phones inside, and call your supplier or the fire department from a safe distance.

Our propane safety guide walks through leak response step by step.

Refilling during recovery

The window after a storm is when supply is worst. Stations may be closed, out of stock, or without power to run their pumps. Delivery trucks work through backlogs and prioritize contract customers. Roads may be impassable.

Practical moves: know several locations rather than one, including the ones a county or two inland that likely kept power. Understand that exchange cages and refill stations are different services with different availability — plenty of open convenience stores can swap a cage but can't fill your tank. Check hours before driving; post-storm hours are unpredictable.

Our refill vs. exchange breakdown explains where each option makes sense.