Cornwall Fire Service is warning about the dangers of carbon monoxide poisoning after three people died at their caravan home in Camborne at the weekend.
John and Audrey Cook, their daughter Maureen and their pet dog, died within minutes - after inhaling fumes from a faulty heater.
Fire officers say having gas appliances checked every year and fitting a carbon monoxide alarm could save lives.
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A light breeze winds across the region, with clouds and rainy spells. There may be mist or fog in places.
Tonight will see light winds across the region, accompanied by cloudy skies, outbreaks of rain and mist and fog spreading north overnight.
Campaigners fighting the abuse chose Bristol bus station to try to educate the public on a growing problem.