The ruling on tayammum when water is present but there is fear of using it
Is tayammum permitted when water is available if harm from using it is feared?
Tayammum is permitted despite water being present if one fears harm from using it due to illness or severe cold that risks death or worsening sickness.
Tayammum is permitted for the sick and for whoever fears worsening illness, delayed recovery, or death from using water.
Tayammum is permitted despite water's presence for one who fears, from using it, loss of life or of a limb's function, and likewise delayed recovery or a gross disfigurement on an exposed part of the body, established by a trustworthy physician or experience. Severe cold is treated like illness.
Tayammum is permissible despite water's presence if one fears bodily harm from using it due to illness or severe cold, being unable to warm the water or avert its harm.