But our correspondent says Pakistan acknowledges that the pipeline route through the troubled province of Balochistan presents significant security challenges.
The BBC's Paul Anderson in Islamabad says that for years Balochistan has seen nothing like this year's rains.
The bulk of the cases are in the province of Balochistan, which has reported 22 cases this year.
Iran has blamed Jundallah for carrying out deadly bombings, abductions and targeted killings in the southeastern Sistan-Balochistan province, which borders Pakistan.
The electricity network broke down on Sunday after a power plant in south-western Balochistan province developed a technical fault, officials say.
Such violence is a common problem in the volatile Khyber Pakhtunkhwa province, which, like Quetta's home province of Balochistan, borders Afghanistan.
It said that nearly 890, 000 people have been affected in Punjab province and 700, 000 people affected in the province of Balochistan.
BBC: Pakistan floods 'kill more than 400' over past fortnight
Pakistan also ordered the United States to vacate Shamsi Air Base in Balochistan, from which many of the CIA drones were launched.
Following talks with Shia representatives from Quetta, Pakistan's Prime Minister Raja Pervez Ashraf sacked Balochistan's chief minister and promised them better security.
Most attacks are either in Balochistan or in the country's northern areas.
The road journey from Mashkel to Zahidan takes a few hours, compared with the 15 to 18 hours it takes to reach Balochistan's capital, Quetta.
BBC: The remote corner of Pakistan flattened by an earthquake
Interior Minister Rehman Malik said on Wednesday night that a "new wave of terrorism" was spreading across southern Pakistan, including Karachi and nearby Balochistan province.
BBC: Relatives gather around the body of Abdul Majeed Deenpuri
Mir Ali Jattak, a former minister of Balochistan province, is the seventh politician to be jailed in recent days for fraudulently claiming to hold a degree.
Tremors were felt in southern Pakistan, including the city of Karachi, and across Balochistan province from Gwadar on the southern coast to Quetta and the border with Iran.
Power shortages have become a major issue in Pakistan, with the government ordering an investigation into a nation-wide power cut on Sunday blamed on a technical fault in a plant in south-western Balochistan province.
The UN says the virus circulated in five high-risk districts in Balochistan and has now spread to areas not previously infected for the past five years, including the country's tribal areas and the provinces of Sindh and Khyber Pakhtunkhwa.
Of a total of 272 general seats, Punjab has a share of 148 seats, Sindh has 61 seats, the North-West Frontier Province (NWFP) has 35 seats, and Balochistan has 14 seats, with 12 seats going to the FATA and 2 to the federal capital.
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