External:
- Environmental conditions - heat/humidity, rain, lightning
 - Facility specific - lighting, floor condition (can relate to environmental issues), safety/padding under the basket, proximity of hazards (scorer's table, stands) to playing surface, leaks, ventilation
 
Player Related:
- Rest and conditioning
 - Hydration status (relates to environmental conditions)
 - Injury prevention*
 - Players creating spills (common!)
 - Players should not stretch (sweat) on the floor
 - Mouth guards (impacts concussion risk and dental injury)
 - Bench maintenance (I keep a towel in the ball bag now)
 - Ankle braces may reduce basketball-related ankle injuries.
 
I may consider rotating players to lead dynamic stretching along these lines.
Being safety conscious shows players and families another part of your total commitment to player development and well-being.