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TUCSON - Summer's sweltering heat will threaten the record books today.

According to News 4 Meteorologist Jeff Beamish, a Heat Advisory is in effect from 2 PM until 7 PM tonight. This includes Pima, southeast Pinal, Santa Cruz, southern Graham and southern Greenlee Counties.

Daytime highs today will range from 110-115 degrees in the Tucson metro. The record high for this date in the Old Pueblo is 111 degrees set back in 2001.

There is a chance of an isolated thunderstorms later this afternoon, with the best chance residing in the mountains of southern Arizona. Monsoon storms look to return in full force Sunday and Independence Day.

Jeff will have the latest on the holiday weekend thunderstorm chances tonight on News 4 Tucson at 5:30 and 10.