Frederick suffered through back-to-back days of 106-degree heat, making it one of the hottest cities in the mid-Atlantic region.
"The hottest temperatures have been in the mid-Atlantic or the desert Southwest," WeatherBug meteorologist Dustin Devine said Wednesday. "There were other hotter locations around the country. ... Not much hotter, but they were hotter."
In Death Valley, Calif., for instance, the high Tuesday was 116 degrees on Tuesday, he said.
Even as Frederick hit 106 degrees for a second day -- the National Weather Service recorded the same temperature at Baltimore-Washington International Airport -- other places in the United States got even hotter.
In Arizona, the thermometer hit 108 degrees in Phoenix, Glendale and Lake Havasu City, and 110 in Wittmann, Devine said.
The heat was no problem for Frederick resident Oliver Cardo, who spent the last 14 months in Iraq.
"Iraq is dry like this," he said. "Between 106 and 110, it's all the same. You're going to go out and say, 'It's hot.'"