Among the dead were a couple and their young daughter who were working on a peanut farm when they were struck by lightning. Hundreds of people die every year from lightning strikes in Bangladesh and experts say climate change has exacerbated the problem.
They also blame deforestation and the loss of taller trees like palms that used to act as lightning conductors. Last year authorities declared a natural disaster when the official toll topped 200 deaths, with 82 people dying on a single day in May.
Experts say the true figure is likely much higher as many deaths go unreported. One independent monitor said 349 people were killed by lightning strikes in 2016.
Last week, more than 160 people were killed and hundreds of homes were destroyed in landslides triggered by heavy monsoon rains in the country's southeast.