For adults, the length of time you can safely stay in a hot car also depends heavily on factors like:
* Outside temperature: The hotter it is outside, the faster the car's interior will heat up.
* Direct sunlight: Direct sunlight significantly accelerates heating.
* Car color: Darker colored cars heat up faster than lighter colored ones.
* Your health: Individuals with pre-existing health conditions are at greater risk.
Even on a moderately warm day, staying in a parked car for an extended period can lead to heat exhaustion or heatstroke. There's no safe timeframe to give, as the risks are simply too high.
In short: Minimize your time in a hot car as much as possible. If you feel unwell, get out immediately.