High-pressure steam leak in Manhattan

A emergency worker in contamination gear walks near the site of an underground steam pipe explosion near Grand Central Station in New York City.

A man takes a photo with his smartphone near the site of a steam pipe explosion on Fifth Avenue near the Flatiron District in New York City.

Firefighters work near the scene of a steam pipe explosion on Fifth Avenue near the Flatiron District in New York City.

Emergency personnel look over a truck that lies in a hole in the street after a steam explosion in midtown Manhattan.

Steam billows on Fifth Avenue in Manhattan on Thursday, July 19, 2018. A steam pipe exploded beneath the street, sending chunks of asphalt flying, a geyser of billowing white steam stories into the air and forcing pedestrians to take cover.

Steam billows on Fifth Avenue in Manhattan on Thursday, July 19, 2018. A steam pipe exploded beneath the street, sending chunks of asphalt flying, a geyser of billowing white steam stories into the air and forcing pedestrians to take cover.

Steam billows on Fifth Avenue in Manhattan on Thursday, July 19, 2018. A steam pipe exploded beneath the street, sending chunks of asphalt flying, a geyser of billowing white steam stories into the air and forcing pedestrians to take cover.

Steam billows on Fifth Avenue in Manhattan on Thursday, July 19, 2018. A steam pipe exploded beneath the street, sending chunks of asphalt flying, a geyser of billowing white steam stories into the air and forcing pedestrians to take cover.

Con Ed workers look at a map of pipes on New York’s Fifth Avenue on Thursday, July 19, 2018. A steam pipe exploded beneath the street, sending chunks of asphalt flying, a geyser of billowing white steam stories into the air and forcing pedestrians to take cover.