"Two of the injured are in serious condition," said Deepak Sawant, the health minister of the western state of Maharashtra surrounding Mumbai, who provided the estimate of casualties.
The stampede took place after the cloudburst caught commuters off guard, prompting scores to scurry for cover under the roof of the station's pedestrian overbridge, said Akash Koteja, one of the injured.
The bridge is usually crowded at that time of day, as it also serves as an exit route for passengers getting off trains at an adjoining railway-station, he added.
Manish Mishra, a witness who helped some of the injured, said the situation was worsened as police and emergency officials did not respond immediately or enforce crowd control measures.
Police and emergency officials were not immediately reachable for comment on Mishra's statement
