MUMBAI: Mumbai, witnessing its wettest September ever, has been put on red alert for Thursday with extremely heavy rain predicted. According to IMD, several weather systems have aligned around the state and this could result in Mumbai and Raigad being lashed by rains like those witnessed in July-end and early August. The state government declared a holiday on Thursday in all schools and junior colleges in Mumbai, Thane and the Konkan region as a precautionary measure in view of the heavy rainfall forecast. School education minister Ashish Shelar announced this late on Wednesday on his official Twitter account. In view of heavy rainfall forecasts. As a precautionary measure, holiday is declared for all schools & junior colle…— ashish shelar (@ShelarAshish) 1568832698000The city has recorded the wettest September ever, as till Wednesday evening, the total rainfall recorded by the IMD Santacruz observatory was 960mm. The previous all-time highest September rainfall was 920mm, in the year 1954. On many days of this month, the city recorded three-digit rainfall figures in a 24-hour period. For instance, 242.2mm rainfall was received between September 4 and 5. Weathermen said with active monsoon conditions, September rain may even cross the 1000mm-mark, which is usually seen in July — when several favourable weather systems cause significant rain activity. Thirteen districts in Maharashtra have been put on heavy rain alert for Thursday with extremely heavy rain at isolated places in Mumbai, Raigad, Satara, and Pune ghats. The heavy rain could lead to localized flooding of roads, waterlogging in low-lying areas, occasional reduction in visibility, and traffic disruption. According to weathermen, several weather systems have now aligned around the state and its adjoining regions. These include moisture supply due to upper-air cyclonic circulation over the Bay of Bengal off south Andhra Pradesh — that could create a situation similar to what the city experienced towards the end of July and early in August. Despite a ‘yellow’ alert issued by the IMD for Wednesday, 38.2mm of rainfall was recorded in Santacruz in the nine-hour period ending 5.30pm, which falls into the moderate rain category. In Colaba, 0.4mm of rainfall was recorded, which falls in ‘light rain’ category. Late on Wednesday, there was thunder and lightning, accompanied by heavy rain in many parts of the city and Thane. However, some netizens took a dig at IMD’s forecast. On Twitter, the handle @ManaliGharat tweeted, “The best way to keep rains away from Mumbai is to have weather dept predict heavy rains #MumbaiRainlive.” Another handle @Subhash_ati also tweeted, “IMD bol rela hai matlab jam ke suraj chamkega kal,” Another tweet, from the handle @neemijoshi, read, “Dear HR, please arrange boat services to reach office. #mumbairains are not in a good mood this week #MumbaiRainlive”. (With inputs from Neha Madaan in Pune)