Ahwaz health officials say 1,500 people ended up in emergency rooms last night due to respiratory problems brought on by rain.

The Mehr News Agency reports that officials claim the presence of a stimulant in the rain water has been causing the widespread shortness of breath.

The officials report that continued rain will result in more emergency calls from people affected by the respiratory problems.

The WHO has ranked Ahwaz as one of the most polluted cities in the world.