The capital city was put on ‘orange’ alert for Friday as heavy rain is expected in the city and suburbs. A ‘red’ alert has been issued for four districts, Thane, Raigad, Pune and Palghar as very heavy rainfall is expected in these areas till Saturday. So far, no district has been put on red alert for Saturday, however, Palghar, Raigad, Ratnagiri, Pune and Satara remain on ‘orange’ alert. The weather office on Thursday predicted that Mumbai’s weather is likely to improve in the next three to four days.