At least nine people were killed by lightning strikes in Gaibandha, Bogura, Thakurgaon, Sirajganj and Natore districts on Sunday.
Among the deceased, five people died in Gaibandha and one each in Bogura, Thakurgaon, Sirajganj, and Natore.
In Gaibandha, five people were killed by lightning strikes in Phulchhari, Saghata and Sundarganj upazilas of the district on Sunday afternoon.
The deceased were identified as Mizanur Rahman, Manik Mia, Nambar Ali, Fuad and Rafi.
Deputy Commissioner Masudur Rahman Mollah said Fuad and Rafi were children, as well as cousins.
Dhopadanga Union Parishad Chairman Mokhlesur Rahman Mondal said that the two cousins, Fuad and Rafi, were struck while playing in the verandah of a house in South Dhopadanga village.
Locals rushed them to Gaibandha General Hospital, where doctors declared them dead.
Farmer Manik Mia was killed by lightning while working in a field in Phulchhari upazila.
Another victim, Nambar Ali, a farmer from Saghata upazila, also died in a lightning strike, said the DC.
Sundarganj Upazila Nirbahi Officer Iffat Jahan Tuli said she was informed about the two deaths in Dhopadanga.
Meanwhile in Thakurgaon, a 40-year-old woman died after being struck by lightning in Pirganj upazila of the district.
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The deceased was identified as Selina Akhter, wife of Md. Rashidul Islam, a resident of Niamatpur village of Saidpur union in the upazila.
Selina died while working near her house in the evening, said Pirganj Police Station OC Mazharul Islam.
Meanwhile, various villages in Thakurgaon district were devastated by a two-day Kalboishakhi storm on Saturday and Sunday.
In Bogura, a 35-year-old farmer named Sumon was killed in Gabtoli upazila.
He had gone to bring back a goat from a nearby field during sudden heavy rain when lightning struck him, killing him on the spot.
An unnatural death (UD) case was filed in this regard.
In Sirajganj, another farmer died after being struck by lightning while working in a field next to his home in Tarash upazila.
Deceased Abdul Hamid, 50, was the son of late Gafur Ali of Betrashin village in the upazila.
Tarash Police Station Inspector (Investigation) Shaha Alam said police visited the spot and legal action will be taken in this incident.
A day labourer was killed after being struck by lightning in Singra upazila of Natore.
The victim, Somrat Hossain, 26, was the son of Saja Fakir of Nagardala village in Shahjadpur upazila of Sirajganj.
He had come to Natore to work as a paddy harvester.
Somrat was struck by lightning while working in a paddy field in the Thengapakuria area of Dahiya union in the Chalan Beel region of Singra upazila.
His co-workers rescued him and took him to Natore Sadar General Hospital, where doctors declared him dead.
Former chairman of Dahiya Union Shariful Islam confirmed the matter, citing local residents.
Police in all affected areas visited the sites and said legal procedures are underway.