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 . The National Weather Service has issued a mix of extreme heat warnings and heat advisories spanning from the Phoenix metro area to California’s interior valleys and desert regions. The scorcher raises alarms because it arrives before many Californians have acclimatized to prolonged extreme heat. MichaelVi – stock.adobe.com The National Weather Service has issued a mix of extreme heat warnings and heat advisories.…