A heatwave will roast California and Arizona, with temperatures soaring as high as 114 degrees, levels more typical of peak summer than early May — as forecasters warn millions could face serious health risks over the next few days. The scorcher raises alarms because it arrives before many residents have acclimatized to prolonged extreme heat , increasing dangers of heat exhaustion, heat stroke and respiratory problems, especially as worsening air quality compounds the threat, reported Newsweek