Riders already suffered in the heat during stage 3 of the Tour de France as they raced over the Pyrenees from Granollers to Les Angles but now they face even more extreme weather for Tuesday's stage 4 from Carcassonne to Foix in southwestern France. Temperatures are expected to reach 37°C in Foix at the time of the stage finish.
Cyclingnews witnessed the fatigue of the riders after they finished in Les Angles. Many were covered in salt stains due to significant sweating and everyone had clearly suffered in the heat of the day.