After the car starting, the temp will rise. But if the temp is too high, it is abnormal. Internal combustion engines achieve optimal efficiency at 93℃. But if the engine overheats, the metal parts running at high speeds may melt together. Then it may cause engine failure.
But we are lucky. Because most modern cars have sophisticated cooling systems. This system uses a chemical coolant, known as antifreeze, to cool the engine. In addition, the system has a water pump, engine coolant hose, thermostat and fan to keep the engine running at optimal temp. But any problem with this system can cause the engine to overheat or stall. While that may caused by low coolant, flexible coolant hose burst, radiator hose burst or others.
The cooling system is under great pressure in summer. Because high temp and traffic jam often prevent the air from flowing inside the engine. Then it will cause the engine temp to be too high. A calibrated cooling system can keep the engine idling for a long time in hot weather. But if the coolant level is too low or the fan belt breaks, the engine temp will rise rapidly.
Therefore, be sure to open the hood and check carefully before driving. Then ensure that the coolant level is at a normal level. In addition, make sure the coolant return hose and cooler hose is in a good condition. In general, clean the radiator and add coolant at least every two years. While you need to flush the radiator with special chemicals to remove the dirt on the inner wall. When driving in summer, the ratio of coolant to water should be 1:1. You can also buy pre-mixed coolant.
When you stop and find there is a pool of water, that may caused by coolant leakage. Then you should check and repair it in a repair store.