Overall temperature isn’t 90C but your lunch could be in contact with those temperatures: https://www.clickorlando.com/news/2019/09/26/heres-how-hot-temperatur

Overall temperature isn’t 90C but your lunch could be in contact with those temperatures: https://www.clickorlando.com/news/2019/09/26/heres-how-hot-temperatures-can-get-in-your-car/ https://www.clickorlando.com/news/2019/09/26/heres-how-hot-t... “In a locked vehicle, a dark dashboard, steering wheel or seat can often reach temperature ranges of 180 - 200 degrees F, which then warms the air trapped inside a vehicle.” 194F is 90C. And that’s Florida, other parts of the globe have higher outdoor temperatures which result in higher internal temperatures.