US Heat Dome Sends Record Temperatures, Cities Open Cooling Centers and Wildfires Scorch 90K+ Acres

About 162 million people across 35 states are under heat advisories as a broad heat dome drives record temperatures and oppressive humidity ahead of the Fourth of July holiday weekend.Cities including New York City and Washington, DC are opening cooling centers and deploying nurse- and paramedic-staffed vans while officials warn of heat illnesses and urge hydration and shade.Drought and dry fuels are sustaining more than 50 large wildfires, the largest burning more than 93K acres in Utah and linked blazes that have killed three firefighters, and officials warn that fireworks and barbecues could spark new fires.