Scorching weather burns up records in Manitoba

A humidex advisory is in effect for all of south and central Manitoba — as far north as The Pas, Norway House and Island Lake — as a sweltering heat wave continues to blanket the province.

A humidex advisory is in effect for all of south and central Manitoba— as far north as The Pas, Norway House and Island Lake— as a swelteringheat wavecontinues to blanket the province.

Temperatures are forecast in the mid-30s for many areas of the provinceTuesday and Wednesday. Combined with high relative humidity, humidex values will reach around 45.

Several hot-weather records have been set in northern Manitoba. Gillam reached 34, smashing a three-decade record of 29.

Thompson, Norway House and Island Lake also set new records, said Environment Canada meteorologist Dave Carlsen.

In Winnipeg,hospitalsconfirmed at least three cases of heat stroke Tuesday. Temperatures reached 34 C by early Tuesday afternoon, one degree away from the record set in 1951, with a humidex of 43.

Average temperatures for the region are around 26 C.

Humidex advisories are issued when the humidex —the perceived temperature, calculated based on temperature and humidity— is expected to reach 40 or more with a dew point of 15 C or higher.

Environment Canada indicates unnecessary activity should be curtailed when a humidex advisory is in effect.Humidex readings above 45 are considered "dangerous," while heat stroke is considered "imminent" when the humidex is over 54.

Smoke, ash falling on north

Forest fires in the north are also affecting the weather there.

"At Lynn Lake, the reporting station was reporting zero visibility in smoke. Even out of Thompson, they were reporting a trace of light falling ash in their observation," Carlsen said.

"You can see the smoke on the visible satellite images, and it pretty much covers the northern part of the province."

A cold front approaching from the west is expected to bringsome relief to western and central Manitoba Wednesday, and to the Winnipeg area on Thursday.

Flin Flon, along the Saskatchewan border in northern Manitoba, has already received 18 millimetres of rain in a thunderstorm Tuesday afternoon.