Rain phobia
 

My teenage son has a phobia about rain - particularly at night. There are issues around noise, air pressure and the unpredictability of it. We use headphones (partially successful) but he still gets very anxious and works himself up to a frenzy. Talk therapy/desentization/CBT are out as he does not have the comprehension or insight to participate. Anyone else had to deal with similar issues? Any possible solutions?
thanks