Severe weather events in the central and southern US has caused increased insured losses of $1bn in April 2012, while economic losses is expected to be much higher, says Aon's 'Global Catastrophe Recap' report.

According to the study conducted by Aon Benfield, has revealed the figure about the catastrophic events happened across the globe during April this year.

During April, the natural calamity in the form of widespread tornado, hail and wind damage rocked the life and property in the multiple central states in the US.

The report also highlights that during the same fatal month, at least 94 tornado touchdowns were recorded during a period of 72-hour.

The disasters have claimed economic losses of nearly $1bn, while various insurers received at least 105,000 claims with payouts in more than $650m.

Impact Forecasting president Steve Jakubowski said tornado frequency data dating to 1991 indicates that May is typically the most active tornado month of the year in the US., which is a warning to all residents and insurers to remain cognizant to potential storm threats.