The Lid Stays Down
A southerly storm cuts the power at 17:40 on a Thursday and two chest freezers start to warm. The pantry's assistant fits a cooling curve to a probe, says when the smaller, older freezer will reach minus 5 (between 13:20 and 21:15, most likely 16:45), and will not promise what is inside a ten-kilo block. Forty-one of the sixty households it feeds have no power either, so raw meat cannot simply be handed out. The story is about a time constant, a rule written before the number arrived, and a stew.
The pantry at St Brendan's had two chest freezers, a gas range with six rings, a pallet of dried lentils, and a coordinator who had been a postmistress for thirty-one years and still could not leave a parcel unattended.
Mairead Costello was sixty-six. On the Thursday the southerly came up the coast, she had locked the hall at five, gone home, and watched the street lights go out at twenty to six. By seven the next morning she was standing in the hall in her good boots with a torch she did not need, because the hall's high windows let in a grey light, and she was looking at two white lids.
"Do not open them," said Tally.
Tally was the pantry's assistant. It lived on a tablet that the diocese had lent and a battery logger that Mairead's nephew had screwed to the wall the winter before, with two probes on thin cables, one threaded through a grommet in the lid seal of each freezer and left lying in the middle of the food. It had been named by the children's group, after the tally sticks they were learning about in school, and the name had stuck because it was accurate.
"I was not going to," Mairead said.
"You had your hand on it."
"I had my hand near it."
"Freezer A reads minus 16.0 degrees. Freezer B reads minus 9.5. It is thirteen hours and twenty minutes since the power went. Both of them were at minus 18 on Thursday at five. I would like to tell you what that means, if you want it."
Mairead sat on a stacking chair and put the torch on her knee. "Tell me."
What was true in 2026, when this story was written, is mostly old and plain.
A freezer that has lost its power is a box of cold food losing heat through its walls. The rate of loss is the temperature difference between the room and the food multiplied by a number for the box, called its conductance, in watts for each degree of difference. A well-made 400-litre chest freezer has a figure of the order of one watt per degree. An older freezer with a worn seal and thin foam has more.
What stands against the loss is the heat the food can take up. Frozen food warms by about 1.8 kilojoules for every kilogram for every degree, so a full freezer with 260 kilograms in it is a thermal mass of about 470 kilojoules per degree, three times more than a freezer a third full. The time constant of the box is its thermal mass divided by its conductance. A chest freezer with 260 kilograms and a conductance of 0.8 watts per degree has a time constant of about 170 hours, a week. One with 90 kilograms and 1.5 has a time constant of about 35 hours. The air temperature inside moves toward the room's as a curve, quickly at first, then more slowly: the gap to the room's temperature shrinks by the same fraction in each equal stretch of time.
Two further facts bound the danger. Cold air is denser than warm air, so a chest freezer with the lid raised for a moment holds most of its cold, unlike an upright freezer, which spills it out the front. And as food warms toward zero degrees, the ice in it has to melt, which takes about 334 kilojoules for every kilogram of water, so a mass of frozen food holds near zero for a long time before the middle of a block is warm. Public health guidance does not rely on the second fact. In New Zealand, as in the United States and the United Kingdom, the usual advice is that frozen food which still has ice crystals in it, or has been kept at 4 degrees or below, may be refrozen or cooked, and that anything that has been above 4 degrees for more than a short time is thrown away. A rule about a probe in the air is not a rule about the middle of a ten-kilogram block, and no one should say it is.
"Your two freezers are not the same freezer," Tally said. "A is the big one. It is full, about 260 kilos, and it is newer. B is the old one with the split seal on the left end. It has about 90 kilos in it, and the cold in a half-empty box goes out faster. The hall is at 9 degrees. I have fitted a curve to the first six readings from each probe. A will take about a week to reach the room's temperature. At the rate it is going, it will read minus 13.6 tonight at midnight, and a little under minus 12 when the lines company says the power should be back, which is Saturday at about noon."
"And B?"
"B is the problem. It will read minus 5 degrees at about a quarter to five this afternoon."
"A quarter to five."
"The fit is from six hours of readings. If I assume the old box is a little better than it looks, minus 5 comes at twenty past one. If a little worse, about a quarter past nine tonight. A quarter to five is the middle. I cannot narrow it. I am wary of the word about, but you should hear it as a range of eight hours."
Mairead looked at the lid. It was not a thing that looked as though it had a time in it.
"What's in it?"
Wiremu Tane had come in by then, shaking sleet from his hat. He had been a butcher for forty years and a volunteer for six, and he knew what was in B without the list. "Thirty-two kilos of venison mince," he said. "From the cull. Twenty-six of chicken thighs. Fourteen kilos of sausages. Ten of bread and some veg. And eight kilos of ice cream from the school fête, God help us."
"The ice cream is in thin tubs," said Tally. "Thin tubs thaw first. I would not keep the ice cream."
Mairead did not say anything for a time. The school fête had been in April. She had sold the raffle tickets.
"What do we do with the rest?" she said.
She did what she always did, which was to ask for the numbers and then to write something down.
Sixty households took parcels from St Brendan's on a Friday afternoon. Tally had the lines company's outage map open, and it showed that forty-one of the sixty were still dark. Nineteen had power, because they were on the other side of the ridge feeder. The nineteen had freezers or fridges that were running. The forty-one had nothing.
"So I can't give the meat out," Mairead said. "Not raw. Not to a woman with a dead freezer. She'd have to cook it tonight on whatever she has, or throw it out, and half of them have no gas."
"That is how I read it too. I would not put thawing meat into forty-one dark houses. I would not put it into houses I cannot reach, either. The hill road is closed at the second bridge."
"Then we cook it."
"For how many?"
"Hot meal, in the hall. Everyone who can walk in. Stew."
"Cooking 34 kilograms of meat and 20 of vegetables with some water makes about 90 litres. Your two big pots hold 50 each. At three hundred and fifty millilitres a bowl, that is about 250 bowls. The forty-one dark households are about 130 people. Two bowls each."
"And the nineteen with power?"
"Frozen packs, from B, early. While the probe still reads under minus 5 and the packs are hard. The chicken and 12 kilos of sausages in one kilo bags. Two kilos each. That leaves venison mince and two kilos of sausage for the pots."
Mairead wrote it down. At the top of the page, in the capitals she used for parcels, she wrote: WHEN B READS MINUS 5, THE MEAT MOVES OR IT COOKS. Underneath she wrote: Packs out by 13:00. Pots on at 15:00.
"Why one o'clock?" said Wiremu. He was reading over her shoulder.
"Because the middle of the range is a quarter to five," said Tally, "and the front of it is twenty past one, and you do not want a bag of mince at minus 5 in somebody's car for forty minutes. The bags will be hard at one. At one, I expect B to read about minus 6.6."
"And if the power comes back early?"
"Then you have a very large stew and I will say I was wrong about how long the line crews would take. I would rather say that."
They moved at twelve. Wiremu opened the lid of B, which Tally did not mind, because with a chest freezer the cold lay in the box like water in a bath and went nowhere in the half minute it took to see. The probe read minus 7.0. The chicken was hard. The mince, in its flat two-kilo bags, was hard in the middle and a little soft at the corners, which Wiremu pressed with his thumb for a long time.
"That's the one," he said. "Thin bags. They go first."
"Cook the mince first," said Tally. "The block you would trust least is the one thin bag in the middle of a thick stack, and I cannot see it."
The ice cream was soup in its tubs, and Wiremu carried the whole of it out to the bins through the sleet without a word. Mairead did not look. She had a rule about not looking.
By one, nineteen two-kilo packs of chicken and sausage were in a line of crates by the door, and Pauline Rua, who ran the Friday desk, was ringing the nineteen households on the one phone line that still worked, to tell them what time to come and to bring a cool bag and a plan. "Put it in your freezer tonight," she said into the receiver, over and over. "Straight in. It's been cold the whole time. It's got ice crystals in it. If it thaws, cook it that day. Do not refreeze it twice."
At three, they lit the rings.
The stew was not a clever stew. Venison mince, onion, carrot and swede from freezer A, which Tally said could be opened for fifteen seconds and no more, a tin of tomatoes, half the stock cubes in the cupboard, pepper, salt. Wiremu browned the mince in batches in the pans, because mince that is simply boiled turns grey and sullen, and Mairead stirred the pots with a paddle she had once used to turn the hall's compost.
Tally did the work that only needed a small steady thing to keep it. It had a skewer probe on a cable, and every time Wiremu thought something was cooked, it read the core of the pot.
"Pot one reads 61 degrees at the centre. Not yet."
"It's bubbling."
"The edge is bubbling. The centre of a 50-litre pot lags the edge. I want 75 degrees in the middle and then I want a minute more. I would hold the stew above 60 until it is ladled."
"Heating 90 litres from the room's temperature to a simmer takes about 28 megajoules," it said to Mairead, when she asked how long. "Your six rings put about 12 kilowatts into the pots between them, which is about forty minutes of full flame, if the pots are lidded and stirred. It is four minutes to four. I think you will have it by a quarter to five."
Mairead looked at the clock above the door. Then she looked at the probe, B's, which Tally had propped on the table so that she could see it. It read minus 5.3 at four.
"Three-quarters of an hour short of your number," said Wiremu.
"It is near it," said Tally. "The number was the middle of a range of eight hours, and the meat was out of the freezer four hours before it came. I would like it noted that I do not know whether the afternoon would have been fine. If B had stayed shut all night, the middle of those packs might have held at ice until the power returned. Or they might not. I cannot see the middle. I can see that you chose, in the morning, with the number you had, and I can say that I would choose the same."
Mairead said, "Write that down," and Tally said it had.
They served at five, in the dusk, with the hall's windows streaming and a camping lantern on every table.
A hundred and forty people came in out of the sleet. Some had walked the shore road. One family had walked the four kilometres from the beach settlement with a toddler on a father's shoulders and a pram full of wet jumpers. Father Anselm, who had come in from the presbytery with a thermos of tea, stood at the door and said what he said every Friday of the year, which was that anyone who kept the Friday fast from meat could have the lentil pot at the other end of the table, and that nobody was to be asked which they were having. The lentil pot, made from the dried stock in the cupboard on one ring of the gas range, which needed no freezer at all, was the first thing to run out.
Wiremu ladled. Tally counted bowls on the tablet, with a small tick for each. It did not announce the total until the last family had gone, and then it said: 238 bowls of stew and 61 of lentils, from 90 litres and 22.
There was a small, hard moment at half past six. A woman who had come early with her mother stood at the end of the table with an empty bowl and said, politely, that her mother could not eat venison, and had she any chicken. Mairead looked at the crate by the door. It was empty. The chicken had gone out at one, to the nineteen.
"We have the lentils," Mairead said. "I'm sorry."
"The lentils are good," said the woman. She sat down.
It was a small cost, and no one was going to remember it except Mairead, who put it in the notebook. Chicken: keep four kilos back next time. Ask who can't eat what.
The power came back on Saturday at ten past twelve, as the lines company had said it would, to the minute, for once.
Tally read A at 12:10 and said, "Minus 12.0. The lid stayed shut for 42 hours and a half. It is not a result I earned. It is a fact about 260 kilos of cold food in a well-made box, and about my having told you the box would hold. "
"And B?"
B was empty. Wiremu had scrubbed it and left it to dry with the lid up. Mairead stood looking in at the clean white box, and at the split in the left seal, and wrote a line in the notebook for the diocese and the parish council: Replace B's seal or the freezer. Buy a second logger.
"Is that all?" said Tally.
"No," she said. She wrote a second line, under it, in the capitals she used for parcels. It said: KEEP THE RULE. She underlined it twice, which for Mairead was a kind of weeping. Then she stood a while longer in the cold hall, with the lamp still on the table from the night before and the first sun of the week coming in at the high windows, and heard in the street outside a van door slam, and a man's voice, and a child's.
The pantry opened at two, as it always did.