Heat Guidelines Heat           Index under               79 degrees     -     Full Activity Heat   Index   80   - 90      degrees      - Provide      ample water             and multiple     water breaks. Heat   Index   91   - 95      degrees      - Light         weight and   loose   fitting cloths. Helmets        only should   be   worn. No               other p   r   o   t   e   c   t   i   v   e   e   q   u   i   p   m   e   n   t   should be worn. Heat    Index    96 degrees            or above       -       No practice .