Simplify the following text for a Grade 8 native English-speaking person.
Original: In Marseille , at the start of stage 13 on Thursday 13 July , he was still suffering as the race headed into Provence on a hot day , and was seen to drink brandy during the early parts of the stage .
Simplified: In Marseille , at the start of stage 13 on Thursday 13 July , he was still suffering the bad stomach as the race headed into Provence on a blisteringly hot day .