TORONTO - Toronto's medical officer of health has issued a heat alert for the city amid soaring temperatures.

It will be in effect until further notice.

In issuing the alert, Dr. David McKeown urged the public to call or visit family, friends and neighbours to make sure they are OK.

Other groups at risk include people with chronic and pre-existing illnesses, infants and young children, people on certain medications and those who are marginally housed or homeless.

McKeown also advised the public to beat the heat by drinking a lot of water or natural fruit juices, going to air-conditioned places such as shopping malls and staying out of the sun.

The temperature was expected to hit 31 degrees Sunday.