That just isn't so. Plants regularly die of thirst, even while roots are awash in a sea of plenty; this, because the lack of oxygen that accompanies over-watering limits uptake of both water and nutrients. This in turn sets up a cycle whereby foliage wilts due to excess water retained in the grow medium. Since the lack of oxygen means limited water uptake, water in the rhizosphere is used at significantly decreased rate, which means that the primary reduction in water retention comes from evaporation which depends on how the grow medium is structured. When media are naturally water-retentive particles are small, compaction occurs, which limits gas exchange and the potential for evaporative water loss. When wilting persists, the most common reflex is to water more, which compounds the problem.
We'll know more after
@LeenaY answers the questions; and, she already has the information needed to determine whether she is over or under-watering. This could even be a case where high temperatures have killed a notable fraction of the plant's roots, which at least to this point keeps over-watering one of the top contenders as causal. Better to wait until all the information is available before we start eliminating potential causes.
Al
