NEW YORK - City transit officials are looking for new ways to plug subway station openings during the event of another big storm.

The MTA says it's exploring alternatives to the plywood and sandbags used in the past to keep floodwaters out of tunnels and stations. One idea is using removable lids that would be placed over subway grates and sealed shut.

Officials hope to prevent the same type of severe flooding that left eight tunnels completely underwater during Superstorm Sandy.