A US congressman will go without food and water in a protest over a Texas law overriding protection for people working outdoors in intense heat.
Representative Greg Casar, a Democrat, says the “thirst strike” will go on until a nurse requires him to stop.
It comes ahead of the Texas rule change and as temperatures soar across vast swathes of the southern and western US.
The new Texas law effectively bans local rules, such as a 10-minute break for every four hours worked outside.
More than 400 workers have died in heatwaves since 2011, according to Bureau of Labour statistics.