Wilting is a signal, not automatically a command to water.
The challenge
On hot days, plants may droop even while the soil still contains moisture. Leaves lose water faster than roots can replace it, especially in intense afternoon sun or hot wind.
The usual mistake
Adding water every time a plant wilts can leave roots saturated after temperatures fall. Check soil moisture several inches down, observe whether the plant recovers in evening shade, and compare new growth with older leaves.
The woodshed test
Test one change at a time: temporary afternoon shade, deeper morning watering, mulch, or wind protection. Record which plants recover and how quickly.
The better move
Treat heat management as an environment problem rather than only a watering problem. Root temperature, sun exposure, airflow, container size, and soil structure all affect how the plant responds.