PHOENIX (AP) -- Think it was a hot Fourth of July in Phoenix - the city's toastiest day of the year - at 116 degrees? That was, at best, only Arizona's second-warmest reading Wednesday.

Try Bullhead City, 122 degrees. Lake Havasu City was forecast to hit 119 but didn't report, the National Weather Service said. Yuma reached 114.

Tucson was a cool 110, Sedona 108.

Across much of the state, an excessive heat warning issued by the National Weather Service remained in effect all day, even as Arizonans tried to blow off some steam - outdoors and in.

"We've been trying to hit it pretty hard this week as far as getting the message out," said Leslie Waneck, a meteorologist in the service's Phoenix office.

"We're expecting extreme heat, the hottest temperatures of the season, and if you can, stay indoors and avoid being outdoors for prolonged periods of time; stay hydrated."

Waneck noted that alcoholic beverages and even sodas, consumed in great quantities, can be extremely dehydrating. She advised lathering up with sunscreen "and try to stay in the shade; better yet, stay indoors."

Fire behavior analysts have issued a dangerous fire behavior advisory, warning of an increased risk level for fires to burn rapidly and with an intensity that could compromise the ability of firefighters to suppress them.

Fire restrictions remained in effect for most of Arizona's national forests and many other state and federal recreational areas; the state is experiencing critically low levels of moisture in live plants, such as leaves and needles - potential fuel in fires.

There are also above-average to heavy amounts of fine fuel, such as dried grasses, and localized areas of dead brush, Ken Palmrose, a fire interagency spokesman, said in a release.

The extreme heat and low humidity forced officials in Flagstaff to cancel the city's annual fireworks show for a second year in a row.

They feared that sparks from the display, combined with breezy conditions in the record heat, might trigger a fire in the tinder-dry Coconino National Forest.

The extreme heat was not causing any added headaches on the state's highways, a Department of Public Safety spokesman said.

But another illegal immigrant death was reported late Tuesday in the desert southwest of Sells on the Tohono O'odham Indian Reservation - the fourth since Friday, U.S. Border Patrol spokesman Jesus "Chuy" Rodriguez said.

The latest presumed heat-related victim was a Mexican man, he said.

Arizona, which has more illegal immigrants cross than along any other point of the border with Mexico, has recorded more than 120 desert deaths since the start of the current fiscal year Oct. 1.

"A lot of the smugglers are giving what we're calling a 'triple-stacker,'" Rodriguez said. "An ephedrine-type pill, aspirin and an energy drink. It's all caffeine, and it's dehydrating. Somebody said it's like a triple dose of caffeine.

"Walking with all this intense heat and caffeine accelerates their body core temperature, so that makes it even worse. And most carry only one gallon of water."

"We want to let people know, we don't want you to cross, but if you're going to cross, this is what you're facing," he said.