During the Second World War 1945, the British Government established a Kalyan Military Transit Camp in a secluded area of 13 square kilometres adjoining Kalyan. Soldiers were accommodated in the welfare camps. From there, soldiers were sent to the battlefield of Assam. Welfare camps were divided into one to five camps. Also, barracks resembling three types of blocks and chassis, such as A, B and C, were the locations for soldiers and officers. After the end of World War II, welfare camps also collapsed.
After the partition of India, the refugees in Pakistan began to take shelter in India. In India, Kalyan Camp was one of the places of residence for such refugees. India's largest settlement of refugees Sindhi people is in Ulhasnagar. The Maratha section is located here in Konkan, a refugee in Karachi. Refugees from Sindh as well as the Gomantak community settled in Ulhasnagar. The first and last Governor-General of India The cornerstone of Ulhasnagar Township was laid on 8th August 1949 by Rajgopalachari.
The town covers an area of 13 square kilometres and is divided into 285 blocks. The total length of existing Roads & Streets in the town measures 352 kilometres. The town is served by underground & open-surface drainage, night soil being disposed of by septic tank latrines.
The town region of Ulhasnagar experiences May as the warmest month and January as the coldest month of the year. The first monsoon, which starts during the second week of June, will last till September end. July and August are the months when maximum rainfall is available in Ulhasnagar. 3000 mm is the annual average rainfall in the region.
It is a centre for the production of rayon silk, dyes, ready-made garments, electrical/electronic appliances & confectionaries.
As Ulhasnagar was formed as a colony of Sindhi migrants from Pakistan during the partition period of India, we can say that the culture of Sindhis is reflected in all fields here such as food, costume, job, rituals etc. Even though they came to this city with a hope that they could go back within some time, it ended up as a dream and Ulhasnagar became their second home.