Heat wave mortality studies reveal climate change impacts and risk for cities - Milan under stress due to heat waves: Study reveals districts most at risk of cardiovascular emergencies - Climate change made some heat waves at least 10 times more likely: Environment Canada - Dangerous heat wave and severe storms hit Midwest - Study tracks decades of extreme heat, cold in Upper Midwest - 'It's unbearable': heat waves scorch southern and eastern Europe - D.C.-area forecast: Historic heat wave culminates with storms later today - 'Unprecedented' heat wave in California brings death, fires, all-time highs - 'It's hell outside': Sizzling heat wave in parts of southern and central Europe prompts alerts