Swedish forestry workers in the southern part of the country have cancelled operations in some areas - because the unseasonably warm weather has left the ground too soft for the heavy machines.

Caterpillar Inc. reported that plant in Oxford, Mississippi, was damaged and collapsed as a result of severe weather. Tornadoes swept through the South on Tuesday.

In a first of its kind study, a research team based at Columbia's Mailman School of Public Health found that changes in urban sprawl and climate that are projected to occur in the New York City metropolitan area by the 2050s could significantly affect air quality and health in the region.