Record-Breaking Heat Baking California, Nevada

By , AccuWeather.com Senior Meteorologist
June 8, 2013; 8:22 PM ET
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Play video Weather across the Southwest is detailed in the above AccuWeather.com video.

Record-breaking heat will bake California and Nevada today, followed by a chance of a stray, dry thunderstorm, raising new concerns of wildfires.

A shallow layer of marine air will moderate temperatures and cause morning low clouds along the coast through Sunday from San Francisco to Los Angeles and San Diego.

However, temperatures will climb to new highs for the season to date in many areas inland including Sacramento, Reno, Las Vegas, Phoenix and Palm Springs. Many locations can eclipse record highs for the date underneath blazing sunshine.

People are reminded to avoid strenuous activity during the midday and afternoon hours, when temperatures will be the highest and the sun is the most intense.

According to Western Weather Expert Ken Clark, "Winds will generally be light, but low humidity, scorching sunshine and climbing temperatures will result in very dry fuels again."

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California Weather Center

Because of the highly variable terrain in the region, local breezes can kick up for a brief time, with no notice.

Caution is advised when using gasoline-powered equipment outdoors. Never pull your vehicle over grassy or dry brush areas. Exhaust systems on equipment and vehicles can be hot enough to start a fire.

An added potential trouble-maker will be the movement of a weak storm in the upper atmosphere toward the coast Sunday into Monday. The system was stalled off the coast of Southern California during much of this week.

"Even though this storm will be moisture-starved, it could produce a stray thunderstorm over the mountains of California and Nevada," Clark said.

The thunderstorms would bring little or no rain, but multiple cloud-to-ground lightning strikes, which could ignite new blazes.

The benefit of the weak storm will be to progressively ease the heat in a west-to-east fashion across California and Nevada Sunday through Monday. The Four Corners and southern High Plains will then have to endure the intense sizzle.

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