The high heat in the forecast this weekend isn't just uncomfortable, it can also be dangerous.

New Yorkers unable to stay cool could be at risk of heat illness, a potentially life-threatening condition.

New York City Health Commissioner Dr. Oxiris Barbot says on average 13 people die per-year in the city from heatstroke.

Those particularly at risk include those with chronic illnesses, the elderly, and infants.

"The important thing to note is that more people die because of heat related issues than they do because of cold. Some people take for granted that, oh I'm drinking lots of water, I'm staying out of the heat, but the reality is that the longer these events go, it's a cumulative effect day after day," said Dr. Oxiris Barbot.

Signs of heat illness can include hot, dry or cold, clammy skin, confusion, hallucinations, loss of consciousness, nausea or vomiting, trouble breathing, and a rapid, strong pulse.

Now to prevent heat illness, the department of health recommends drinking plenty of water, not alcoholic or caffeinated drinks that can actually dehydrate you.

Other tips include staying out of the sun when possible.

And wearing light clothing as well as sunscreen.