Usually if the sunroof drain or the heating,a/c evap case drain is clogged. Other reasons would be if the windshield was improperly replaced.
Rain
Finding water in the driver's side footwell of a Corsa C could be due to a few common issues. Check for leaks in the door seals, as worn or damaged seals can allow rainwater to enter. Additionally, inspect the drainage holes in the windshield cowl area; if they're clogged, water can overflow into the cabin. Lastly, ensure that the heater matrix isn't leaking, as this could also contribute to water accumulation.
Pour a bucket of water into the passenger footwell
Heateer Core is gone
If water is getting into the passenger footwell one or more of the weatherstripping has failed. Check the doors as the weatherstripping makes a funned to drain a lot of the water. If there is a leak that can be leading into the cabin of the car.
Cracked heater core
the heater core is leaking or ac drain is stopped up
Yes, water vapors enter in the atmosphere.
any leak on your drivers door, or firewall. could be just about anything.
There is pink anti freeze leaking inside of my car the passenger side what does this mean?
in the driver footwell there is a lever near the accelerator pedal on the side of the footwell, you can't miss it.
If it is Left-hand drive, it is behind the carpeting on the upper console of the drivers footwell. If it is righ-hand, then it is in the same place, but in the passenger footwell. If it is Left-hand drive, it is behind the carpeting on the upper console of the drivers footwell. If it is righ-hand, then it is in the same place, but in the passenger footwell.