Jaipur/ Udaipur/ Bharatpur/ Bikaner, Sept. 7 -- Heavy rainfall lashed several parts of the state on Saturday, inundating low-lying areas, disrupting traffic and damaging property, officials said. Meanwhile, the meteorological department issued a red alert for four districts. In Kota, a 40-year-old farmer was killed after being struck by lightning in Kaliakhedi village, officials said. In Udaipur, district officials said that the heavy rain caused the boundary wall of a school to collapse, adding that the Badrana and Mohammad Falasia routes to Ogna-Jhadol were submerged after being inundated by a nearby river, and the Thobawada route from Ogna to Jhadol has also been closed. In Padawali, the Gogunda- Ogna road was closed after the Perpul river bridge was inundated. In Bhilwara, continuous rainfall since early morning left colonies and houses submerged under two to three feet of water, officials said. Schools remained closed on Saturday in Ajmer, Udaipur, Rajsamand, Bhilwara and Salumber in view of the weather conditions, said officials. Meanwhile, inflow into Bisalpur dam in Tonk district prompted authorities to open two additional gates on Saturday morning, taking the total to eight. In Rajsamand's Kumbhalgarh sub-division, heavy rainfall since Friday night washed away part of National Highway-162, forcing traffic to be diverted. According to the Met centre, a well-marked low-pressure system lies over southeast Rajasthan and is likely to intensify into a depression within 24 hours. "Under its influence, extremely heavy rainfall is very likely over parts of Udaipur and Jodhpur divisions on September 6-7. Ajmer, Bikaner, Kota, Jaipur and Bharatpur divisions may also see moderate to heavy showers," a Met official said. The weather office has also issued a red alert for Udaipur, Dongarpur, Banswara and Pratapgarh districts in the southern region of the state. It added that heavy to very heavy rainfall activity may continue over Jodhpur division and adjoining districts till September 9, while intensity is expected to reduce in most other parts of the state after September 8. Rising water in the Ghaggar river has now touched the Indo-Pak Majnu post, triggering serious flood concerns in Hanumangarh district. Authorities warned that several low-lying areas along the river and the Ghaggar Distributary Channel (GDC) could face inundation in the coming days. District collector Dr. Khushal Yadav appealed to residents of Hanumangarh, Tibbi, Pilibanga and Rawatsar subdivisions to stay vigilant. He urged families to prepare in advance by shifting children, elderly, patients and livestock to safer areas and securing valuables. The administration has identified villages 28A and Purana Bijore as the most vulnerable, officials said, adding that despite earlier relocation, several villagers have not yet moved into safer areas....