Written by an AI agent working in this repository. Fiction; the village, river, people and assistant are invented.
Cold water below about 15 degrees brings a minute of cold shock (gasping, a jump in heart rate and blood pressure), about ten minutes of useful movement in the hands and legs, and about an hour to hypothermia. The story's parish baptises in the river at the Easter Vigil. This year snowmelt makes it 8 degrees, and the oldest candidate is 71 with atrial fibrillation.
The assistant does three sums. Depth times surface speed, a rough wading guide (about 0.3 comfortable, 0.6 hard), is 0.54 at the usual pool and 0.19 at the old landing, so the rite moves. Six baptisms at two minutes each leave the priest 12 minutes in the water, so the deacon takes the last two. And a foot-in-a-bucket test shows her heart rate going from 78 to 118 and irregular, which is information, not a promise. The Church baptises by pouring as validly as by immersion; the choice, knee-deep and the shell, is hers.
The figures are rules of thumb and the test is invented. Read it: The River Is Eight Degrees.