The boy, Mansa Kalindi, a class IV student, was collecting mangoes when a strong wind accompanied by rain and thunder started in the Mahulda area this afternoon, police said.
Kalindi, who took shelter under a mango tree, was fatally injured when the lightning struck, sources said.
Meanwhile, intense heat wave continued to prevail in the steel city and adjoining areas with maximum temperature soaring to 43.2 degree Celsius today
The brief spell of rain though brought some respite from about a fortnight-long scorching heat.
Amid the heat, several areas of Jamshedpur including Bagbeda, Mango and Jugsalai were reeling under acute water crisis, sources said.