Heavy rainfall and thunderstorm warnings issued for several states, list released. The IMD has issued heavy rainfall and thunderstorm warnings for several states and UTs for Saturday (October 10). Heavy rainfall is very likely in parts of Kerala, Puducherry and Tamil Nadu. Thunderstorms accompanied by lightning and gusty winds reaching speeds of 40-50 kmph are very likely in parts of Haryana, Chandigarh, Delhi, Kerala, Puducherry, Lakshadweep and Tamil Nadu.