This northern port city is less than 25 miles away from two major oil refineries. But on Friday, the pumps at many gas stations were wrapped in red and white tape, the electric price signs flashing all nines. Little gasoline was to be had.

Across France, a third of stations are fully or partly dry, victims of a fast-widening strike that has spread to most of the country’s major refineries, as well as some nuclear plants and railways, offering a preview of a winter of discontent as inflation and energy shortages threaten to undercut Europe’s stability and its united front against Russia for its war in Ukraine.

At the very least the strike — pitting refinery workers seeking a greater share of the surging profits against the oil giants TotalEnergies and Exxon Mobil — has already emerged as the first major social crisis of Emmanuel Macron’s second term as president, as calls grow for a general strike next Tuesday.

“It’s going to become a general strike. You will see,” said Julien Lemmonier, 77, a retired factory worker stepping out of the supermarket in Le Havre on a gray and rainy morning. He warned that if the port workers followed suit, “It will be over.”

The widening social unrest is just what European leaders fear as inflation hits its highest level in decades, driven in part by snarls in post-pandemic global supply chains, but also by the mounting impact of the tit-for-tat economic battle between Europe and Russia over its invasion of Ukraine.

Economic anxiety is palpable across Europe, driving large protests in Prague, Britain’s biggest railway strike in three decades, as well as walkouts by bus drivers, call center employees and criminal defense lawyers, and causing many governments to introduce relief measures to cushion the blow and ward off still more turbulence. Airline workers in Spain and Germany went on strike recently, demanding wage increases to reflect the rising cost of living.

For France the strikes have touched a long-worn nerve of the growing disparity between the wealthy few and the growing struggling classes, as well as the gnawing worry about making ends meet in the cold winter ahead.

Workers at half of the country’s eight refineries are continuing to picket for higher wages in line with inflation, as well as a cut of the sky-high profits their companies made over recent months, as the price of gasoline has surged.