If you've actually been taken ill by the heat and need medical help, you would say you have insolation (sunstroke). J'en ai marre de cette chaleurComplaining is considered something of a hobby in France and J'en ai marre is an essential expression that you can use in any circumstances, not just when it's hot. The expression J'en ai marre means 'I'm fed up', 'I'm sick of it' and 'It's getting on my nerves'. J'en ai ras-le-bol de cette chaleurThe delightful little term ras-le-bol means something along the lines of gloominess, despondency, despair, bleakness, "fed-upness" or discontent in general. It is most often used as part of the phrase "en avoir ras-le-bol" which when put into the first person form would be: "j'en ai ras-le-bol".

Source: The Local July 25, 2019 08:07 UTC