A man walks his dog along the Vistula River as temperature drops to minus fifteen degrees Celsius in...
A man walks his dog along the Vistula River in the early morning hours as temperature drops to minus fifteen degrees Celsius in centre Warsaw February 10, 2012. Czech day ahead power hit a fresh three-year high on Thursday, while deliveries for the next few weeks fell as weather forecasts predicted some relief to freezing temperatures that have swept across Europe, traders said. REUTERS/Peter Andrews (POLAND - Tags: ENVIRONMENT ENERGY ANIMALS)