Low lighting

Dark scene

The only sound is the water and slight noises from the woman

Quick cuts towards scenes

POV shots looking at tap

Low angles in the water

Big close up to show panic

Close up on shower head for hope

Squeaking of tap being turned

Sound of the water draining

Breathe of air

Wide shots of tap

Close ups on face to show her panic

Mid shots on feet to show her struggle

Not much time between shots changing

More noises from woman as water gets higher

Framing, keeps what's happening in the scene limited (just her face, the tap, her hand with the shower)