If you mean engine coolant is getting into the car, the heater core is leaking coolant causing the coolant level to drop and that causes the engine to over heat.
Example sentence - The coolant in my car was leaking out.
The overflow tank is either cracked or its overheating and leaking from the cap
If by water you mean engine coolant, yes. Loss of coolant, antifreeze, is a major cause of overheating.
You could be leaking coolant, your blower fan might not be working, etc.
Coolant
If your talking about coolant leaking on the passenger floor then it means your heater core is leaking and needs to be replaced.
if car is leaking fluid , it has a leak a leak and steaming indicates it is engine coolant and the engine is over heating find the leak and fix it before your trash your engine
My car is is running hot and smoking... i discovered the coolant was low i added new coolant and its pouring out the bottom of my car My car is is running hot and smoking... i discovered the coolant was low i added new coolant and its pouring out the bottom of my car
Just because there is a leak doesn't mean it will overheat instantly, but if you do not keep adding coolant or fix the leak you will have engine problem
A leaking heater core will cause the engine to overheat because the coolant is leaking out.
The heater core is leaking coolant.