The city is racing to put up 277 sensors. Once installed, Chicago will have the biggest number of high-quality air monitors ...

Chicago Tribune photographers capture a summer storm that swept the area ending in a rainbow over Lake Michigan.

As Air Canada prepares to cancel flights ahead of a possible strike, CBC's Britnei Bilhete spoke to one Ontario woman who says she’s worried the trip of a lifetime with her childhood friend could be ...

Officials are investigating whether a Chicago Park District lifeguard was struck by lightning Tuesday afternoon.