Community groups are demanding action from the city’s mayor and Texas’s Republican congressional delegation

More than 100 people filled the council chamber at Houston city hall on Tuesday, spilling into the hallways as they waited their turn to address the mayor, John Whitmire, and the rest of the city council. Outside, a crowd gathered on the plaza. Their chants of “Do your job! Do your job!” carried through the chamber walls.

Nearly all were there to demand the same thing: accountability for the fatal shooting of Lorenzo Salgado Araujo by an Immigration and Customs Enforcement agent.

The oil giant’s sponsorship deal with Fifa has featured prominently at matches in Houston. But 100 miles away in another Texas city, residents say the firm’s refinery is exposing them to poisonous gases and long-term health problems

The street is wide, its grass verges thick and scruffy after a week of rainstorms. Jamal Johnson will walk home straight down the middle carrying his plastic shopping bag, a jot of motion through the stillness. He lives in one of the modest wood-panelled houses spaced out on each side, most lovingly kept and passed through at least two generations. There is nobody else in sight, but a freight train breaks the silence, grinding left to right along the line flanking the north-facing gardens. The west side of Port Arthur, Texas, could be any lower-income neighbourhood in the southern states if it were not for the looming menace on the other side of the track.

This is a sad, unsettling place. “I’ve got a load of friends and family who’ve had weird diseases,” says Johnson, his face contorting at the thought. He lists a grandfather and aunt who died of cancer, the latter at a young age after relocating here to care for other relatives. An uncle died with complications from ALS (motor neurone disease). “You know what I’m saying? Man, they’ve let off all these poisonous gases; it’s like that all the time. It’s fucked up.”