Sunlight refracted through glass sparked a fire which spread to two homes.
It started on a wooden fence before moving to the terraced houses in Dorset Crescent in Basingstoke at about 16:00 BST on Saturday, said the fire service.
It was an “important reminder to ensure that glass ornaments and mirrors are kept out of sunlight, particularly in hot weather”, Hampshire and Isle of Wight Fire and Rescue Service said.
Firefighters returned to their station at about 18:00, after conducting other home fire safety visits.
