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