Hot weather warnings issued for 7 European countries

Weather forecasters have issued extremely hot weather warnings for seven western European countries this week, according to report by Reuters.

Temperatures in Berlin are expected to remain at highs of 35-36 degrees Celsius until Monday, media reported citing the World Meteorological Organization. In France temperatures are expected to rise 4.0 degrees Celsius above seasonal norms.

Such heat waves will be increasingly common in the future, a Stanford University study concludes. "In the next 30 years, we could see an increase in heat waves like the one now occurring in the eastern United States or the kind that swept across Europe in 2003 that caused tens of thousands of fatalities," Noah Diffenbaugh, an assistant professor of environmental Earth system science at Stanford, said in a statement, according to Associated Press.

According to calculations by Diffenbaugh and Moetasim Ashfa, reported in the journal Geophysical Research Letters, within 30 years average temperature could be 3.6 degrees Fahrenheit, or 2 Celsius, higher than in the mid-1800s.