As weather starts to cool in much of the country, the heat-baked cement and sweaty afternoons from this summer fade from collective memory. But activists and labor groups representing outdoor workers haven’t forgotten. They are pushing lawmakers and regulators to keep facing the heat.

Texas-based nonprofit Workers Defense Project went public Friday with the details of an unfair labor practice charge it filed with the National Labor Relations Board in February.

Oscar Torres has logged hours working at construction sites across Dallas-Fort Worth throughout the last seven years. Six times now, he hasn’t been rightfully paid, he said, losing upwards of $5,000.

Jasmine Granillo was 11 years old when her family joined other workers in a “thirst strike”—a protest in which participants decline to drink water—on the steps of Dallas City Hall in 2015. For a full day, Jasmine’s father Gustavo Granillo went thirsty to draw attention to the death of his 25-year-old son Roendy Granillo and pressure the city to pass a water break mandate to protect construction workers from heat illnesses.