Manufacturing overhead consists of only indirect product costs. Some companies even refer to it as indirect overhead.. Others call manufacturing overhead by the label, factory overhead. Indirect costs cannot be easily traced to specific products or services provided. Because period costs have no relationship with products, they are never labeled as direct or indirect.
The United States averaged 1,274 tornadoes per year in the last decade. April 2011 saw the most tornadoes ever recorded for any month in the US National Weather Service's history, 875; the previous record was 542 in one month.
There can be as many as 40,000 thunderstorms each day around the world. They are most common in the U.S., where they can produce tornadoes, floods, lightning and damaging winds.