The National Weather Service has issued a heat advisory for Cook County and the surrounding area. What's causing the extreme temperatures, how long will it last and what do storms in the forecast mean? Ash-har Quraishi has the story on how to brave the heat wave safely.

This week on Chicago Tonight: The Week in Review, Monday's violent storm leaves a mess in its 75 mph wake and hundreds of thousands without power. It was a busy week at City Hall with Mayor Rahm Emanuel cutting city agency credit cards, elected officials' security details, huge vacation payouts and announcing layoff notices to 625 of the city's union workers. Illinois' leading real estate organization admits grossly overstating prices of homes sold in Chicago, possibly going back as far as 2008.

ComEd has restored service to more than 600,000 customers affected by this week's power outages, but that leaves well more than 100,000 still without power. We talk with an official from ComEd about the progress of the restoration. ComEd Storm Center Outage Map Centers for Disease Control and Prevention: Power outage safety

Monday's storms left hundreds of thousands without electricity. ComEd has been working around the clock to restore power to customers but full restoration could take days. Ash-har Quraishi has the story.

What are the health hazards associated with thawing food in your powerless refrigerator? Our Elizabeth Brackett and her panel discuss this and other health-related concerns caused by the storm.

Paris Schutz has the story of why one suburb is fighting for more bees, and why some residents there feel a bit stung.

Curb Your Enthusiasm's Jeff Garlin joins us to talk about his new stand-up comedy show in town—and his efforts to curb some of his own appetites.

We hear from Dr. David Ansell, the author of a new book about the history of Cook County Hospital.

Summer is in full swing. And along with sun, swimming and street festivals, mosquitoes are also a reality of the season. How much of a concern are West Nile-infected mosquitoes? Illinois' Director of Public Health talks about that and other public health concerns.

A new form of DNA may help treat cancer, new understandings about ancient civilizations, and the important role of happiness in health. Chicago Tonight's science guy Neil Shubin talks about those stories, and his own upcoming research in the Arctic.

If you think your child doesn't have a food allergy, you might want to think again. A new study reveals that food allergies are on the rise nationwide. Dr. Ruchi Gupta sits down with us to discuss the study.

It's a struggle many Americans will soon face -- caring for their aging parents. Jane Gross joins us to discuss her new book on caregiving.

The effects of fetal alcohol syndrome are well-documented. So why is there controversy over how much an expectant mother should drink during pregnancy? We talk to a leading local pediatrician and the author of The Mystery of Risk: Drugs, Alcohol, Pregancy and the Vulnerable Child. More on the Story: Info, videos on book & Fetal Alcohol Syndrome More on the book

Do cell phones cause cancer? And what exactly does the World Health Organization have to say about it? A Chicago scientist who contributed to the latest report joins us to clarify the findings.

We hear what you had to say about recent stories when we read some of our viewer mail. Send Chicago Tonight your comments

Dangerous hallucinogens and stimulants are being sold in area stores -- legally. Paris Schutz has more on the controversy over so-called "designer drugs."