The risk of being injured in a manhole explosion will be at its highest this week for New Yorkers as salty melted ice and snow will pour into the city manholes after a sudden increase in temperature. Hundreds of manhole explosions have sent several people to the hospital this winter in New York City. The heavy use of salt in the streets of New York during the wintry weather is to blame for these explosions. The salty melting ice gets through the street cracks and erodes the underground electrical wires and cables causing dangerous manhole explosions that can injure passers by.There were well over a thousand of them so far this winter according to Con Ed. 600 explosions were reported in New York City in the first week of February alone. To prevent these explosions Con Ed started to install manhole covers with grates. These covers don’t prevent fire but at least in case of a fire they allow smoke to escape thus preventing an explosion.