The IMD has issued dense fog and thunderstorm warnings for several states/UTs. Dense fog is very likely in Punjab, Haryana, Chandigarh, Delhi, Bihar, Odisha, Assam and Meghalaya on February 3 (Monday). Thunderstorm accompanied with lightning is very likely over Rajasthan on Monday, and over Jammu and Kashmir, Ladakh, Himachal Pradesh and Uttarakhand on February 4 (Tuesday).