A powerful monsoon surge, reinforced by an approaching westerly disturbance, is set to drench large swaths of Pakistan from July 18 through July 25, with authorities warning of flash floods, urban flooding, and damage to weak infrastructure. The Pakistan Meteorological Department (PMD) issued an advisory Friday detailing the timing and geographic scope of the expected downpours. Main Developments Monsoon currents from the Arabian Sea are continuously penetrating the upper and central parts of the country and are expected to strengthen over the weekend, the PMD stated. A westerly disturbance is also forecast to approach the upper regions on Monday, July 20, amplifying the rain. Read also: Fuel Cost Adjustment Seeks Rs1.20/Unit Hike for August Bills From July 18 to July 25, with occasional gaps, Azad Jammu and Kashmir (Neelum Valley, Muzaffarabad, Rawalakot, Poonch, Hattian Bala, Bagh, Haveli, Sudhnoti, Kotli, Bhimber, Mirpur) and Gilgit-Baltistan (Diamer, Astore, Ghizer, Skardu, Hunza, Gilgit, Ghanche, Shigar) can expect rain, windstorms, and thundershowers, accompanied by scattered heavy to very heavy falls. In Khyber Pakhtunkhwa, heavy to very heavy rainfall is forecast from the night of July 19 to July 23 across districts including Dir, Chitral, Swat, Kohistan, Malakand, Nowshera, Charsadda, Karak, Tank, Lakki Marwat, Swabi, Shangla, Battagram, Buner, Kohat, Kurram, Dera Ismail Khan, Bannu, Waziristan, Bajaur, Mohmand, Khyber, Orakzai, Mansehra, Abbottabad, Haripur, Peshawar, Mardan, and Hangu. Punjab's Murree, Galliyat, Attock, Chakwal, Jhelum, Mandi Bahauddin, Gujrat, Gujranwala, Hafizabad, Wazirabad, Faisalabad, Khushab, Sargodha, Lahore, Sheikhupura, Sialkot, and Narowal will see similar conditions from the night of July 19 to July 23. Southern Punjab districts — Sahiwal, Jhang, Toba Tek Singh, Nankana Sahib, Chiniot, Okara, Noorpur Thal, Bhakkar, Mianwali, Layyah, Bahawalpur, Bahawalnagar, Dera Ghazi Khan, Multan, Khanewal, Lodhran, Muzaffargarh, Kot Addu, Rahim Yar Khan, Rajanpur — are forecast to receive rain and thunderstorms from July 20 to July 24. In Balochistan, northeastern districts (Zhob, Sherani, Loralai, Kohlu, Sibi, Naseerabad, Jhal Magsi, Jaffarabad, Barkhan, Dera Bugti, Khuzdar) will experience rain, windstorms, and isolated heavy falls from July 19 to July 23. Most of Sindh will remain hot and very humid, though isolated rain or thunderstorms are expected in Tharparkar, Mithi, Sukkur, Larkana, Shikarpur, Dadu, and Jacobabad from July 20 to July 24. Background The PMD regularly issues monsoon advisories as seasonal low-pressure systems from the Bay of Bengal and Arabian Sea bring heavy rainfall to Pakistan, particularly between July and September. This year's monsoon currents have been active since early July, with previous advisories warning of similar patterns across the northern and central regions. The current forecast combines two distinct weather systems: monsoon currents from the Arabian Sea and a westerly disturbance approaching from the west. Westerly disturbances are typical in Pakistan's winter and spring, but their interaction with monsoon flows can intensify rainfall, as seen in past seasons. Why It Matters Strong winds and lightning associated with the storms could damage weak structures, including electric poles, billboards, and solar panels — a concern for areas still recovering from earlier weather events. Heavy rainfall may trigger flash floods in local streams and nullahs in upper Khyber Pakhtunkhwa and Gilgit-Baltistan, while urban flooding is possible in low-lying areas of Islamabad, Rawalpindi, Gujranwala, Lahore, Sialkot, Multan, and Faisalabad from July 20 to July 23. The advisory carries direct implications for travelers, farmers, and local authorities. The PMD advised tourists to avoid unnecessary travel to vulnerable areas during the forecast period and urged farmers to plan agricultural activities accordingly. Relevant authorities have been asked to remain vigilant and take precautionary measures to prevent untoward incidents. What's Next Residents in the affected regions should monitor local updates as the weather systems evolve. The PMD will likely issue further advisories if conditions change, particularly regarding the intensity or timing of the heaviest rainfall. Authorities are expected to activate emergency response plans for flood-prone areas, while travelers and farmers adjust their schedules based on the seven-day forecast window.