Read the passage given below and answer the questions that follow

Managing urban development to keep pace with internal migration is a major challenge for India. As more people shift from agriculture to industry and services, cities are faced with a massive influx of migrants. Given limited capacities, urban infrastructure is bursting at the seams. World Bank projections show urban centres accounting for 40% of India's population by 2030 and crossing 50% by 2040-45. Given our traditional lacklustre attitude towards urban development - thanks to a political bias in favour of rural India - our cities are looking at bleak futures unless we tackle the issue now.

It is in this backdrop that the Delhi-Mumbai Industrial Corridor (DMIC) project to build new futuristic cities assumes significance. Expansion of existing urban metropolises is insufficient to deal with demand. By 2020, there will be a shortfall of 30 million urban dwelling units, 200 million water connections and 160 GW of power. In many cases, such as Delhi and Kolkata, expansion is simply not possible due to constraints on land. Short of Baron Haussmann's forcible renovation of Paris in the 19th century to decongest the French capital, building new cities from scratch is the best way to quickly create urban infrastructure.

What is the meaning of 'bursting at the seams in the context of the passage?