At least 15 people are dead and dozens more are missing.

Students and teachers at hundreds of Toronto schools without air conditioning sweltered their way through record-breaking heat on Wednesday, as the city’s largest school board said it understood why some parents might choose to keep their children at home.

Southwest Florida is reeling from a toxic algae bloom called red tide. Hundreds of tons of dead fish are washing up on beaches.

The temperature at Logan International Airport rose to 97 degrees shortly after 1 p.m. Wednesday, topping a record set in 1953.

A man from Nunavut has been killed in a polar bear attack, according to local RCMP. A polar bear mother and cub were destroyed at the scene. This is the second fatal polar bear attack in Nunavut this summer

The British Columbia government has declared a state of emergency to support the provincewide response to the ongoing wildfire situation.

Authorities warn 17ft of water could hit Lynchburg in Virginia in minutes if a dam overspills.

The beach at a state park in upstate New York has been closed because of a toxic algae bloom.

As many as 29 people have died due to heatstroke in South Korea, according to the South Korean Ministry of Health, Welfare and Disease Control.

Swimmers have reported feeling nausea, itchy skin and irritated eyes after vising the popular lake.

Nearly 4,000 dead fish were counted on Sanibel area beaches and parks.

A local firefighter who was killed fighting a fast-moving wildfire was identified Friday as crews continued to battle the blaze in Redding, California.

Vegetable prices are rising rapidly in Japan after a deadly heatwave saw highs of more than 40C. Record-breaking temperatures triggered a spike in the cost of some foods with increases of up to 65 per cent.  An agriculture ministry official in Tokyo warned about "pretty severe price moves" for vegetables if predictions of more weeks of hot weather held up, resulting in less rain than usual.

If you see something that looks like tomato soup in Puget Sound, here's why.

Firefi­ghters say around 160 reside­nts have been briefl­y trappe­d in their homes due to the floodi­ng

Algae blooms have infiltrated much of the Cape Coral canal system, creating a foul odor and a green, spray-paint tint to some of the water.

Seniors, children and people with chronic health issues are advised to stay indoors and use air conditioning where possible.