Photo: America's Cup TV
MetService issued a severe thunderstorm warning for the Selwyn district and Ashburton until 5.30pm.
The warning has now been lifted.
During a severe thunderstorm, people should shelter indoors away from windows.
"Torrential rain can cause surface and/or flash flooding about streams, gullies and urban areas, and make driving conditions extremely hazardous," it said.
"Very strong wind gusts can break branches from trees, damage roofing, and make driving hazardous especially for high-sided vehicles and motorcycles."
There is also a severe thunderstorm watch for the Canterbury Plains and High Country until 7.30pm.
The National Emergency Management Agency advises that as storms approach people should:
- Take shelter, preferably indoors away from windows
- Avoid sheltering under trees, if outside
- Get back to land, if outdoors on the water
- Move cars under cover or away from trees
- Secure any loose objects around your property
- Check that drains and gutters are clear
- Be ready to slow down or stop, if driving
During and after the storm people should beware of fallen trees and power lines, and avoid streams and drains due to the risk of being swept away in flooding.