Fairly widespread to widespread rainfall activity with isolated heavy to very heavy falls are likely over the Western Himalayan region and adjoining plains of northwest India during this week, though the day temperatures are expected to rise by a few notches.The rainfall intensity is likely to increase over north-west India in the next two to three days, a bulletin issued by the India Meteorological Department (IMD) on August 7 said, even as the monsoon over the region remains 12 per cent below the long period average.Above-normal maximum temperatures by 2-3 degrees Celsius are very likely over some parts of the plains of north-west India on some days of the week, though there is no probability of a heat wave or warm nights, the bulletin added.Light to moderate, fairly widespread to widespread rainfall is expected over most parts of the western Himalayan region on many days of the subsequent week from August 13-19, with isolated heavy to very heavy rainfall likely over Himachal Pradesh, Uttarakhand and Jammu and Kashmir.During the second week, the maximum temperatures are likely to be above normal by 2-4 degrees Celsius, though the weather department has ruled out the possibility of heat waves or warm nights.Currently, the monsoon trough, a key rain-bearing weather system, is near its normal position and likely to remain in this position during these two weeks, the IMD said. Currently, a western disturbance is affecting northwest India, and another western disturbance is likely to affect this region thereafter.According to IMD, the monsoon was “normal” over Punjab and Haryana during the past 24 hours, with light to moderate rain along with gusty winds occurring at a few places in both the states. Day temperatures in these states were below normal while the night temperatures remained normal.While the monsoon during August is 6 per cent above the long period average (LPA) in Haryana, it is below the LPA by 27 per cent in Punjab. The seasonal rainfall since June 1 is deficient by 26 per cent in Haryana and by 30 per cent in Punjab.The seasonal rain has been above the LPA in only three districts of Punjab — Amritsar, Gurdaspur and Pathankot, and in five districts of Haryana – Kurukshetra, Rewari, Gurugram, Nuh and Palwal, the IMD data showed.