The Tigra Dam is located on the outskirts of the city. The dam is now being used to store water from the Sank river and supply water to the city. The reservoir is used for leisure activities including speed boating, paddle boating, and water scooters. The Swarna Rekha river is a reconstructed part of the Swarna Rekha river which was dried during the British raj. Boat rides run between Padav in central Gwalior to Gwalior Zoo. The Lashkar part of Gwalior has many parks, including the "Phool Bagh," or the garden of flowers, built to welcome the Prince of Cambridge and the Italian Garden - the garden which was used by the Scindias as a place of relaxation, is Italian in architecture with a water pool surrounded by musical fountains. Ambedkar Park and Gandhi Park are other prominent parks. Gwalior Zoo provides a home for white tigers, serpents, golden pheasants, sambar, hyena, bison, and others. Gwalior has a sub-tropical climate with hot summers from late March to early July, the humid monsoon season from late June to early October, and a cool dry winter from early November to late February. Under Köppen's climate classification the city has a humid subtropical climate. The highest recorded temperature was 49 °C and the lowest was −1 °C. Summers start in late March, and along with other cities like Jaipur and Delhi, are among the hottest in India and the world. Temperatures peak in May and June with daily averages being around 33–35 °C (93–95 °F), and end in late June with the onset of the monsoon. Gwalior receives 900 mm (35 in) of rain on average per year, most of which is concentrated in the Monsoon months (from late June to early October). August is the wettest month with about 310 mm (12 in) of rain. Winter in Gwalior starts in late October, and is generally very mild with daily temperatures averaging in the 14–16 °C (58–62 °F) range, and mostly dry and sunny conditions. January is the coldest month with average lows in the 5-6 °C range (41-42 °F) and occasional cold snaps that plummet temperatures down to a single digit. Gwalior was found to have the second-highest level of air pollution according to a World Health Organization study in 2016.