LOS ANGELES, Aug. 17 (Xinhua) -- As the death toll from the Hawaii wildfires keeps rising, the debate has got heated around whether sirens could have made a difference against the deadliest fires in modern U.S. history. The fires that started on Aug. 8 in Maui Island killed 111 people as of Thursday, with the death toll expected to rise as searches continue. When the wildfires broke out,