Ice is seen covering a street after a hailstorm in Sao Paulo, Brazil, on May 18, 2014. (Nilton Fukuda/AP Photo)

Brazil's biggest city escaped its most severe drought in decades on Monday - but with a storm that brought marble-sized hail to São Paulo.

The Center for Emergency Management said the storm brought 0.4 inches of precipitation - a small if crucial amount for the city's water supply. Water levels at Såo Paulo's main reservoir had sunk as low as 10% of its capacity, the lowest level on record, according to a report by the Wall Street Journal in early May.

A man carries a block of ice left behind by a hailstorm in Sao Paulo, Brazil, on May 19, 2014. (Nelson Antoine/AP Photo)

The frozen precipitation is a rarity for the region, with some citizens explaining to local media that their children had never seen hail or played with naturally occurring ice. It blanketed the city's streets, and the ensuing melt flooded some areas of the city and stranding vehicles.

A family plays with hail after a hailstorm in Sao Paulo, Brazil, on May 19, 2014. (Nelson Almeida/AFP/Getty Images)

The city faces the possibility of water rationing only weeks ahead of the start of the World Cup games in Brazil. The storm affected a match between the Corinthisans and Figueirense played Sunday night in the newly-constructed Itaquerao Stadium, sending spectators not underneath the partially completed roof in search of shelter, reported British newspaper The Independent.

Children play with hail after a hailstorm in Sao Paulo, Brazil, on May 19, 2014. (Nelson Almeida/AFP/Getty Images)