Hanoi is experiencing temperatures of 36-38 degrees centigrade. Over the past two days, lots of people have flocked to the lake for swimming.
Children are equipped with lifebuoys to ensure safety.
Bui Khanh Hung, 11, is often taken to the lake by his father. He brings a ball with him to play.
Hung has finished a swimming course, so going to the lake helps him to practice swimming.
Many adults also flock to the lake.
The lake is most crowded at 6 pm.
Linh Dam Lake’s water is quite clean, which is why it attracts many people.