Very hot showers indeed can cause or aggravate skin dryness, especially in combination with soap which can remove the skin lipids. Excessive scrubbing with wash clothes will further aggravate dry skin.

Long or frequent showers remove protective oils that the skin naturally produces. When the oils are lost, water from the skin also escapes. Using harsh soap can exacerbate the effect

Try using a mild soap, particularly one designed for sensitive skin, for those areas that require extra scrubbing—like your face, under your arms, and in the groin area. Or replace your traditional soap with an oil-infused shower gel

and

I remove 99.9% of dirt by use of a shower filter.
By taking a hot shower you end up absorbing over 600 percent more chlorine and other chemicals than you would from drinking the same un-filtered water all day!