内容摘要：Twenty-two police officers and seven firefighters were injured, the ministry said, adding that 264 vehicles were set on fire.

Twenty-two police officers and seven firefighters were injured, the ministry said, adding that 264 vehicles were set on fire.

Danielle Desjardins, a meteorologist with Environment and Climate Change Canada based in Winnipeg, told the BBC that the forecast for both provinces is not promising.While a cold front is expected to hit some parts of Saskatchewan, it will not bring relief to the regions where fires are burning.

"The bad news about this cold front is it's going to be windy," said Ms Desjardins, adding that the wind, coupled with the heat and lack of rain, are prime conditions for wildfire spread.Smoke from the fires has also left an estimated 22 million Americans under air quality alerts this weekend.In northern Minnesota, residents have been warned smoke could reach levels "unhealthy for everyone", while the rest of the state faces air quality warnings for sensitive groups. That alert runs through Monday evening.

Canada experienced its worst wildfire season on record in 2023, when more than 42 million acres (17.3m hectares) burned.Fires happen naturally in many parts of the world, including in Canada.

But climate change is making the weather conditions needed for wildfires to spread more likely, according to the UN's climate body.

Extreme and long-lasting heat draws more and more moisture out of the ground and vegetation.Salmón Chile's chairman, Arturo Clements, says the government needs to do more to help the industry expand.

"For us it's been very difficult to grow, because we have too many regulations, and we have too many conflicts regarding the use of the sea," he says. "What we need is to define a long-term strategy regarding salmon farming."Much of the conflict concerns the locations of many of the fish farms, which critics say are highly polluting.

More specifically, there are 408 salmon farming concessions – licenses granted by the government that allow a company to operate a salmon farm in a specific area – within supposedly environmentally protected areas in Chile.These include 294 in national reserves, where limited commercial use of natural resources