August dog days come to North Texas with 100-plus temps

North Texas should see triple-digit temperatures for the third straight day as August heats up.

Sunday's official temperature of 104 degrees at D/FW Airport made it the hottest day of the year so far.

Monday's forecast calls for temperatures as high as 105 to 107, especially north of Interstate 20. The heat index (temperature plus humidity) could hit 110.

At 5 p.m., the official temperature at D/FW Airport was 103 degrees.

Saturday's high was 102 degrees.

The air was relatively dry over the weekend, but the National Weather Service in Fort Worth issued a heat advisory for Tarrant County and points east at 11 a.m. Monday.

Monday marks the first day high school football teams who did not hold spring drills can practice, so coaches will be on the lookout as athletes hit the field.

In addition, most of the city of Weatherford was expected to be without water all day due to problems at the treatment plant.

With a massive upper-level high pressure system centered over Texas, things won't get much better for the foreseeable future, with triple digits predicted through Saturday, said Nick Hampshire, a meteorologist at the National Weather Service's Fort Worth office.

If there is any consolation, it will be a "dry heat," that feels like an oven instead of a sauna.

Drier southwest winds have moved into the region and will keep the relative humidity to below 30 percent in the afternoon hours.

"The one saving grace for this one is the low humidity," Hampshire said. "That keeps the heat index down, and we'll cool off into the upper 70s at night. It will be different from that last heat spell we had when the humidity was high.

This summer has been relatively mild so far, with six days of 100 degrees or more recorded at D/FW Airport. On average, 16 days a year get that hot, Hampshire said. The record of 69 days was set during the epic heat wave of 1980. The record high for Dallas-Fort Worth in August is 112 degrees, set in 1909 and 1936.

But there is one August record we can only hope will be shattered.

On Aug. 31, 1915, the record low for the month was 55 degrees.

Steve Campbell, 817-390-7981