The explosion was caught on doorbell camera
Residents of Penllarger, Swansea, were shocked this afternoon when they heard a small explosion.
An electrical transformer at the corner of the playground appears to be responsible.
Footage of the incident was captured on a doorbell camera – showing a large orange flame followed by a massive explosion.
Residents took to social media to find out what had happened, with some thinking it might have been a lightning strike.
National Grid has been asked to comment.
Video edited by Alex Knill