A tale of two Great Falls: In the US, weather extremes rule USA TODAYRecord-breaking heat wave will send temperatures soaring for days: Live updates CNNEarly blast of heat and humidity leaves millions sweltering across the US Yahoo! VoicesMidwest, Northeast to experience hottest weather in years as temps near 100 F AccuWeatherEmergencies Declared Across the Northeast as Heat Index Hits Triple Digits The New York Times