As we are entering the summer and I just read about another tragic drowning of a child in a pool in Spain, I implore you to ALWAYS check the dangerous places when your child goes missing first, both at home and abroad.
It is better to spend two minutes checking the pool, the street, inside the dryer - anywhere that could be dangerous, before checking the normal obvious go to places.
When time is so crucial, its better to spend those most important minutes checking the unlikely but dangerous places before checking the obvious and normal hiding spots.