The roof of the two-story property in Andover was blown off after being hit by a thunderstorm, Hampshire and the Isle of Wight Fire and Rescue Service (HIOWFRS).
Smoke was pictured coming from the semi-detached house on Mercia Avenue, with firefighters urging people to avoid the area.
A 70-year-old woman was examined by paramedics at the scene but was not taken to hospital, firefighters added.
Yellow thunderstorm warnings are in place for the entire south coast and parts of Wales until Sunday midnight.
It comes after a week of extreme heat across the UK, with temperatures exceeding 30C (86F).
Forecasters say the heatwave will be replaced by heavy rain, hail and gusts of wind over the weekend.
The Met Office issued two thunderstorm warnings for Saturday and Sunday respectively.
Heavy rain is expected in southern England and Wales on Saturday, with 50mm (2 inches) falling in just an hour, and up to 100mm (4 inches) falling in places on Sunday.
Those hoping to make the most of the first weekend of the school vacation might be disappointed, with around six million leisure trips expected this weekend, according to the RAC.
Heavy rains run the risk of flooding, road closures and dangerous driving conditions, while strong winds – up to 55 mph in coastal areas – are likely to cause problems for people staying in tents or caravans.
Ferry services could also be affected, the Met Office added.
Sunday’s storm warning is moving east into East Anglia and may disrupt the Latitude Festival in Suffolk.
Around 40,000 people are expected to attend the event at Domaine de Henham Park as part of the government’s major events pilot program.
Northern England will likely have calmer weather, with less rain and more sunshine, although temperatures will be cooler than they were this week.