An expansive heat dome is intensifying across central and eastern US, driving temperatures to 105°F and forcing officials to change public events, travel and energy operations.New York City Mayor Zohran Mamdani expands cooling centers and pool hours while utilities report wholesale electricity prices surging more than 243% in New England and ComEd issues alerts to nearly 80K customers.Rail operators including
Amtrak reduce speeds,
New Jersey Transit warns of cancellations,
Delta waives change fees at
LaGuardia Airport, and officials link the heat to climate change as 72.2M Americans plan holiday travel.