The India meteorological department on Monday issued an 'orange alert' for Mumbai and Thane signalling very heavy rainfall till June 21.
The orange colour-coded warning for heavy rains on June 20-21 was issued for the coastal districts of Ratnagiri and Sindhudurg, the IMD said.
The IMD has four-colour coded alerts: green (no warning); yellow (watch); orange (alert); and red (warning).