La Nina Has Been Quietly Repricing Your Commercial Property Insurance for Six Years

What does La Nina have to do with an insurance renewal?

La Nina is a periodic cooling of surface temperatures in the equatorial Pacific. It is one phase of a larger cycle called ENSO, the El Nino Southern Oscillation, which describes the relationship between Pacific Ocean temperatures and global weather. La Nina is the cool phase, El Nino is the warm phase, and they alternate on a roughly two to seven year cycle.

The chain from there to your renewal is more direct than it looks. When the Pacific cools, it shifts atmospheric pressure in ways that reduce Atlantic wind shear, the variation in wind speed and direction across altitudes that normally tears storms apart before they can organize. Less wind shear means storms form more easily, intensify faster, and last longer. More intense storms produce more landfalls, more landfalls produce more carrier losses, and those losses get repriced. Reinsurers and carriers model this explicitly, so years of elevated storm activity get baked into renewals whether the owner sees the reasoning or not. As Grace framed it, most owners simply see the number on the renewal and accept it for what it is, with no larger context for why it moved.

Why has this particular stretch been so unusual?

Historically the ENSO cycle alternates fairly regularly. What happened between 2020 and 2026 did not. There were four La Nina events in six years, an extended, La Nina-dominant Atlantic environment that insurance markets repriced for over and over.

The 2020 to 2021 La Nina produced the most active Atlantic hurricane season on record: 30 named storms, 13 hurricanes, and six major hurricanes, so many that the naming convention ran out of letters. That was the first loud signal to reinsurers that the loss environment had changed. Reinsurance rates began moving in 2021, and by 2022 that repricing had worked its way into primary renewals across the Southeast, where owners who had seen stable costs for years suddenly faced double-digit increases. It did not stop. The 2021 to 2022 season brought Hurricane Ida and major Louisiana losses. A brief El Nino in 2023 let the market catch its breath. Then La Nina returned for 2024 and 2025 and delivered Helene and Milton, part of 27 declared disasters on the named storm index. In effect, the market has been in a near-continuous La Nina repricing environment for years.

What does the named storm data actually show?

The clearest way to see it is the named storm property index over a two-year view, with disaster markers and the Consumer Price Index overlaid. CPI matters here because it tracks the rising cost of labor, materials, and services, the same inputs that determine what it costs to repair and rebuild after a storm.

CPI behaves like a slow escalator. It does not spike or crash; it climbs month after month, sitting around 327 over this window. That steady climb sets a floor under the market, and the floor keeps rising.

That is the squeeze. La Nina pushes pricing up when hurricane season peaks, and CPI prevents it from ever fully recovering. The disaster markers make it concrete: 27 of them cluster at the peaks rather than spreading evenly. At one peak sits Hurricane Milton, a major hurricane that struck Florida in the fall of 2024, with named storm pricing at $5.16, the top of the range. Three forces hit at once there: La Nina amplifying the whole season, CPI lifting the floor, and a direct landfall on top of both. After Milton, pricing collapsed into early 2025, but it did not fall back to where it had been two years earlier, because the floor had moved. Heading into the 2026 season it is climbing again, around $4.87. For anyone renewing named storm coverage in the next six months, the question of whether you renew before or after the seasonal peak has a real dollar value attached.

Why is North Carolina a completely different story?

Switch to the North Carolina package index with a construction-spending overlay and the picture inverts, and that contrast is the whole point of the episode. Total construction spending ran high into the summer of 2024, then fell off a cliff from September onward and bottomed near two-year lows. At the same moment construction was collapsing, insurance pricing did the opposite.

The marker in the middle is Tropical Storm Helene, which hit North Carolina in late September 2024. From that single point, North Carolina package pricing ran from around $11 to nearly $17 while construction activity cratered.

Contractors, materials, and labor were absorbed into disaster recovery, new development essentially stopped, and higher insurance costs and lower building capacity arrived together. There were only four declared disasters on this chart, versus 27 on the named storm index, but one of them roughly doubled the market. Pricing pulled back from the $17 peak but settled at $13 to $14, about double the prior baseline, and sits near $13.96 now, with another declared disaster landing in the summer of 2025 on top of the new floor.

Even a quieter El Nino season will not bring North Carolina package pricing back, because the cost of rebuilding the state is structurally higher now and the rebuild of western North Carolina is still underway.

What does this look like for one real renewal?

To make it concrete, take a small multifamily property in Raleigh: five to 50 units, gross income under $500,000, replacement cost value under $3 million, built before 1980, with a renewal due in 90 days. The broker has come back and said the market is hard and this is the best price available. Here is what the data adds.

The estimated rate online, the cost per $1,000 of coverage, comes in around $4.99. Two of the building's own characteristics are pulling that price down: its replacement cost value is worth about a 23.4% reduction and its rent profile about 15.7%. So the asset itself looks good. What pushes the number back up is location and placement: the carrier is adding about 12.3% and the geographic region another 9.8%.

That distinction matters, because the carrier is a placement decision, not a fixed market condition. Looking at who actually writes this risk, there are only a couple of carriers in the peer set, roughly Nationwide near $6.95 and a Westchester surplus lines option near $7, a tight and expensive range with no low-cost carrier competing at the bottom. That tells you where the leverage is, and it is not carrier shopping.

The point of the scenario is that the levers are visible. You can see which factors are helping you, which are hurting you, who is competing for the risk, and where there is room to move, instead of accepting a single number with no context.

Will a strong El Nino bring relief?

This is the trap. La Nina is fading, NOAA has issued an El Nino watch, and some models point to a strong El Nino arriving around peak hurricane season. The instinct is that fewer storms must mean lower insurance costs. That is not how pricing works.

El Nino suppresses storm activity on average, but it does not eliminate risk; Hurricane Andrew, one of the most destructive storms in US history, came during an El Nino year, and one storm is all it takes to reset a market. More importantly, carriers are not waiting to reprice downward. The reset that happened in North Carolina, and the pricing baked in across six years, does not automatically unwind when the cycle flips.

The one piece of good news is visibility: if carrier appetite starts to shift or competition opens back up at the bottom of the market, it shows up in the transaction data before most owners feel it at renewal.

What should you actually do before your renewal?

The episode lands on three audiences. If you own or operate in a named storm market, the CPI floor should change how you think about timing. Waiting out a hard market in the hope that pricing returns to where it was is no longer supported by the data, because the floor is higher every year. Waiting is not a strategy; understanding what is driving your specific number and finding the available leverage is.

If you own in North Carolina, the construction overlay is worth sitting with, because it says the market has not found its new normal yet. You are renewing in a market that is still actively repricing itself, so the factor analysis is where any leverage will show up.

And if you are a lender or debt fund underwriting in these markets, the two overlays should change how you model insurance going forward. It is not enough to look at current pricing and assume it reverts to the mean. A named storm market with a rising CPI floor and a North Carolina-style market still finding its baseline produce materially different net operating income projections over a five-year hold, and most models do not distinguish between them.