A longtime UPS driver died of heat stroke after brutally hot temperatures took over Texas last week.

Driver Chris Begleys union, the Teamsters, told Dallas station WFAA-TV that the 57-year-old collapsed while making deliveries near McKinney last Wednesday, where temperatures were around 101 degrees.

He initially refused a trip to the hospital but entered care days later and died on Sunday, according to his union.

Begleys fellow worker mourned the death of the 28-year UPS veteran in a touching obituary, calling his commitment to delivering packages safely and on time a testament to the core values of the Teamsters: solidarity, integrity, and hard work.

Chris Begley embodied the spirit of what it means to be a Teamster, the tribute said. He was a tireless advocate for workers rights, always standing up for fair wages, safe working conditions, and the welfare of his fellow Teamsters.

UPS responded to news of Begleys death in a statement to The Messenger news site: We are cooperating with the authorities as they continue to investigate the cause of death. We train our people to recognize the symptoms of heat stress, and we respond immediately to any request for help.