Is watering flowers in the heat harmful?

[deucher]

I have flower pots and some flowers at home, and I know that my mother told me that they should not be watered when it is hot and should wait until the evening. I don't always do this, but all my vases and flowers are intact and healthy. Do you follow this rule and is it really true?

 

[Nomad]

When you water plants during the heat, when the soil is cracked due to heat, watering can damage the roots, thus harming the plant