Weather today: The India Meteorological Department (IMD) has issued a fresh weather update for July 25 (Saturday), warning of heavy to very heavy rainfall across several parts of the country over the next few days as the southwest monsoon remains active.According to the weather department, Gujarat is expected to receive the heaviest rainfall during this period, while heavy showers, thunderstorms, lightning and gusty winds are also likely across Rajasthan, Delhi-NCR, Himachal Pradesh, Uttarakhand, Punjab, Madhya Pradesh, Odisha, Assam, Meghalaya and several northeastern states.ALSO READ: Brazilian scientist who defied a dictatorship bought 63 African queen bees in 1956; a year later, 26 escaped and became one of America's most notorious invasive insectsThe IMD said a low-pressure area over southeast Rajasthan and adjoining Madhya Pradesh, along with the active monsoon trough and multiple cyclonic circulations, will keep rainfall activity vigorous across northwest, central, western and northeastern India.Why is it raining so heavily across India?The IMD said active monsoon conditions are being driven by a low-pressure area over southeast Rajasthan and adjoining Madhya Pradesh.ALSO READ: After 11 years at Kentucky Ford plant, diabetic worker was fired over a $1.95 cookie, later offered $33,000 in back wages after proving he paid, now plans to sue the carmakerThe weather system, supported by the monsoon trough and cyclonic circulations, is expected to fuel widespread rainfall over several regions during the next few days, increasing the chances of heavy rain, thunderstorms and strong winds.Delhi and the adjoining NCR are likely to witness light to moderate rain accompanied by thunderstorms today, July 25.Rainfall activity is expected to increase over the following two to four days, with heavy rain likely at isolated places from July 27. Cloudy skies and humid weather are expected to continue, while temperatures are likely to remain close to normal.Mumbai weatherMumbai and the Konkan region are likely to receive heavy rainfall, with isolated very heavy spells possible.Waterlogging in low-lying areas and traffic disruptions cannot be ruled out as active monsoon conditions continue across Maharashtra's coastal belt.Ahmedabad weatherAhmedabad is expected to witness heavy to very heavy rainfall, with isolated extremely heavy spells across Gujarat.The IMD has warned that intense rainfall may lead to localised flooding, waterlogging and disruption to normal life in several districts.Jaipur weatherJaipur and several parts of East Rajasthan are likely to receive heavy rainfall, with isolated extremely heavy spells expected.Thunderstorms accompanied by lightning are also likely as the low-pressure system continues to influence weather conditions across the state.Kolkata weatherKolkata and parts of Gangetic West Bengal are expected to witness moderate to heavy showers along with thunderstorms tomorrow.Gusty winds may accompany the storms, while rainfall activity is expected to remain active over the coming days.Hyderabad weatherHyderabad is likely to witness thunderstorms accompanied by lightning and gusty winds. Strong surface winds are also expected across Telangana, while light to moderate rain may occur at isolated places.Bengaluru weatherBengaluru is expected to experience thunderstorms with gusty winds during the day. Although widespread heavy rain is not forecast for the city, scattered showers and strong winds are likely across parts of Karnataka.Chennai weatherChennai is likely to witness thunderstorms accompanied by lightning and gusty winds. Light to moderate showers may occur at isolated places as weather conditions remain favourable for convective activity over Tamil Nadu.Guwahati weatherGuwahati and several parts of Assam are expected to receive heavy rainfall accompanied by thunderstorms and lightning.The IMD said rainfall activity will continue across much of the Northeast over the next several days.State-wise IMD weather forecastGujaratHeavy to very heavy rainfall is likely, with isolated extremely heavy rainfall over the next day.Heavy rain is expected to continue over the following two to three days, raising the possibility of waterlogging and localised flooding in vulnerable areas.RajasthanHeavy rainfall is likely across several parts of the state, with East Rajasthan expected to receive isolated extremely heavy spells.Thunderstorms accompanied by lightning are also likely, while rainfall activity is expected to continue during the next few days.Delhi, Haryana and PunjabLight to moderate rain and thunderstorms are likely initially, with rainfall activity set to intensify over the coming days.Heavy rain is likely at isolated places across Delhi, Haryana and Punjab from July 27 onwards.Himachal Pradesh and UttarakhandHeavy rainfall is expected to continue over the next few days, with isolated very heavy rainfall likely from July 27 onwards.The IMD has advised residents to remain alert in landslide-prone and low-lying areas.Madhya PradeshHeavy rainfall is likely over many parts of Madhya Pradesh during the next two days.Thunderstorms accompanied by lightning and gusty winds are also expected at isolated places under the influence of the active low-pressure system.OdishaHeavy rainfall is likely at isolated places over the next two days, with thunderstorms and gusty winds expected in several districts.Rainfall activity is likely to increase again during the latter half of the forecast period.Bihar and West BengalHeavy rainfall is likely over Bihar, while Gangetic West Bengal may witness heavy showers accompanied by thunderstorms and gusty winds.Rain activity is expected to remain active over the next few days.Assam, Meghalaya and NortheastHeavy rainfall is likely across Assam, Meghalaya, Nagaland, Manipur, Mizoram and Tripura over the next several days.Thunderstorms accompanied by lightning are also expected across much of the Northeast.Konkan and GoaHeavy to very heavy rainfall is likely over Konkan and Goa, with isolated intense spells expected.Waterlogging and traffic disruptions are possible in low-lying areas as monsoon activity remains active.Tamil Nadu, Karnataka and TelanganaThunderstorms accompanied by lightning and gusty winds are likely over Tamil Nadu and Interior Karnataka, while Telangana may witness thunderstorms and strong surface winds.Coastal Karnataka is also expected to receive heavy rainfall.Monsoon updateThe IMD said active monsoon conditions will persist over the country due to a low-pressure area over southeast Rajasthan and adjoining Madhya Pradesh, supported by the monsoon trough and multiple cyclonic circulations.These weather systems are expected to keep rainfall activity active across northwest, central, western and northeastern India during the next few days.IMD's latest forecastAccording to the IMD's latest forecast, Gujarat is likely to receive the heaviest rainfall over the next two days, while heavy rain, thunderstorms and gusty winds are expected across large parts of north, central, eastern and southern India.The weather department has also warned of possible waterlogging, localised flooding and traffic disruptions in areas receiving very heavy rainfall.Residents in affected regions are advised to monitor local weather updates, avoid unnecessary travel during intense downpours and remain cautious in flood-prone and landslide-prone areas.