Mumbai under orange alert, several pockets get above 100 mm rainfall
Mumbai woke up to heavy rainfall on Monday morning as the monsoon made its comeback after a brief dry spell. The India Meteorological Department (IMD) subsequently issued an orange alert for Mumbai, Thane and Palghar till 8.30 am on Tuesday indicating heavy spell of rains to continue throughout the day. According to IMD, the city's coastal observatory at Colaba recorded 100.4 mm of rainfall till 8.30 am on Monday, while the Santacruz observatory recorded 86 mm during the same period.
The IMD classifies rainfall recorded between 64.5 mm and 115.5 mm during a 24-hour spell as heavy rainfall.
Data shows that between 8.30 am and 5.30 pm the observatories at Colaba and Santacruze had recorded 42.4 mm and 69.6 mm of rainfall each.
Brihanmumbai Municipal Corporation's (BMC) automated weather system (AWS) showed that several pockets in Mumbai recorded three digit rainfall. The highest rainfall of 161.4 mm was recorded at Wadala, followed by 155 mm at Worli, 134 mm at Bandra, 109 mm at Erangal (Malad) and 103.4 mm at Bandra Kurla Complex (BKC). Furthermore, the Kurla and Powai areas recorded substantial rainfall of 86.53 mm and 83.2 mm each.
Meanwhile, weather bureau officials said that light to moderate rainfall activity in Mumbai will continue till June 18 (Wednesday), and the spell will intensify further during the weekend.
'Currently, an upper air cyclonic circulation system lies over central Bay of Bengal off north coastal Andhra Pradesh while yet another upper air cyclonic system which was over Marathwada, lies above South Madhya Maharashtra that has led to the intense rainfall taking place in the last 24-hours. A monsoon trough has also developed mainly over the Konkan districts of coastal Maharashtra as a result of which the island city has seen heavier rainfall compared to the suburbs during the past 24 hours,' a weather bureau official told The Indian Express.
IMD data furthermore shows that since the monsoon arrival on May 26, IMD's Colaba observatory has recorded 261.5 mm of total rainfall which is 48% of its monthly average and the Santacruz observatory recorded 204.6 mm of rainfall have recorded at Santacruz which is 38% of its monthly average.
Mumbai this year has seen an early monsoon onset on May 26 — earliest in 75 years, usually the arrival of southwest monsoon takes place anytime between June 8 to 15 every year and the average rainfall recorded during the month of June stands at 537 mm at Santacruz and 542 mm at Colaba.
Overall, the city records an average of 2,319 mm rain in between June and September which are labelled as monsoon months for the year.
Waterlogging recorded
Taking note of the May 26 rainfall situation, the Brihanmumbai Municipal Corporation (BMC) had augmented the number of dewatering pumps to be deployed in Mumbai. While waterlogging was recorded in multiple pockets in the suburbs and the island city, the city's lifeline – local train, BEST buses remained operational. Traffic movement in the highways and arterial roads recorded snarls, however vehicular movement remained operational. While the Andheri subway was shut for a few hours, areas in Kandivali, Malad subway, Khar subway also got partially submerged during the rains as a result, the traffic department had diverted vehicular movement.
'This time we had prepared the remedial measures in advance as the forecast for heavy rains were alerted beforehand. The quantum of rainfall recorded was also not very high and considering the pumps were operational, severe waterlogging was not recorded anywhere this time,' Abhijit Bangar, additional municipal commissioner told The Indian Express.
After the May 26 rainfall, the BMC had augmented the numbering of dewatering pumps to 514. Prior to that, the civic authorities had planned to install around 380 pumps across several flooding prone zones in Mumbai. The civic officials said that after the May 26 rains new flooding spots were identified where pumps were placed to mitigate water logging. Alongside this, the BMC had also deployed ten vehicle mounted dewatering pumps as a mitigation measure.
Tree collapse, house collapses reported
Following heavy rainfall, BMC's disaster cell record shows that 36 tree collapse incidents were reported in Mumbai.
In one such incident a 48 year old man – Jay Basu was injured after a tree fell on him. The injured was rushed to BMC's seven hills hospital, following which he was treated and discharged.
According to civic body data, 22 incidents were reported in the western suburbs, eight in the eastern suburbs and six in the island city.
Meanwhile, BMC data shows eight house collapse incidents recorded in Mumbai. In one such incident, two women – Arlyn Paul (59) and Sugandha Kadam (63) were injured after a portion of a housing structure collapsed. Civic officials said that the two persons are currently in stable condition.
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