Which tense has been used in below sentences? Is it Present Perfect (Passive) Tense? If so, then why is there no agent?
Below activities are not done by someone. Activities have happened in the past and have present impact.
At least two hydropower stations have been flooded at the site, forcing them to shut down.
The water level in my city has increased up to 10 feet, due to heavy rain.
My father has been injured in a car accident.
Villages around the area have been cut off from the outside world, because there is no electricity.