Four people were killed and a fifth was injured in a mass shooting at a Midtown Manhattan office building on Monday.

Officials said the gunman fatally shot himself after his attack, which set off a chaotic scene that rippled out into the heart of Manhattan during rush hour.

Extreme heat has again enveloped the tri-state area, prompting the National Weather Service to issue heat advisories through Wednesday. This week is shaping up to deliver the second heat wave of the summer in New York City through mid-week,