British and American experts have warned that threat of more frequent and severe food shortages are posed by extreme weather events like intense storms, droughts and heat waves. These weather events will have adverse impacts on the global climate and food supply system.

The researchers said that food shortages were previously used to happen once a century under past conditions. However, food shortages are now likely to take place once every 30 years because of increased pressure on the world's food supplies and the surge in extreme weather events.

"The chance of having a weather-related food shock is increasing, and the size of that shock is also increasing. And as these events become more frequent, the imperative for doing something about it becomes even greater", said Tim Benton, a professor of population ecology at Leeds University who presented a report commissioned by the British government.

The UK-US Taskforce on Extreme Weather and Global Food System Resilience compiled the report.

Demand for food is continuously increasing world over, putting a great pressure on the food system. Ability to meet food demands is lacking to a significant extent and extreme weather events are only making the situation worse.

Drop of 5-7% in production of the world's four major crops- corns, soy, rice and wheat - is called as a food shock. Researchers says food shocks in the past recorded happening once in 100 years, but the condition have now exacerbated to such an extent that future will see them once every 30 years.

If climate change continues at its current rate, major food shocks will become even more common as soon as the year 2070.