Drew Peterson, a meteorologist with the National Weather Service’s Sacramento office, said temperatures will reach 100 degrees on Friday, June 28, with weekend highs topping 103 degrees by Sunday, June 30.
Lows will be in the mid-60s through the weekend.
“We will be experiencing far warmer temperatures starting Thursday,” he said Wednesday, June 26.
Peterson said a high-pressure system over the desert southwest is bringing the warm air west into California.
The forecast high for Monday, July 1, is 111 degrees.
The high-pressure system that is causing the heat should weaken by the Fourth of July, but temperatures will still be in the 90s.
“If you go outside, it will still be hot — you are still going to sweat,” Peterson said.
Peterson said the hot weather will stay in the area longer because an “atmospheric blocking pattern” will hold the high-pressure system over the Central Valley.
The average high for the month of July is in the low 90s, according to AccuWeather.
Dr. Ton Ngo, department chair for urgent care at Sutter Gould Medical Foundation, said the heat wave will put the elderly and people who have hypertension and take diuretics at the greatest risk.
“When it is hot, try not to be active — don’t pick the hottest time for yard work,” Ngo said.
In the past, Ngo said a heat wave brought a handful of patients to the clinic experiencing a heat-related illness, usually people who work outdoors or in warehouses without adequate ventilation.
He said people can get exertional heat stroke when they don’t drink enough water, wear a hat or take rest breaks in the shade.
Signs of heat-related illness include confusion, trouble walking and muscle cramps.
Ngo said other symptoms may include skin that is red and hot to the touch, vomiting and possibly fainting.
During the heat wave, Ngo advised drinking plenty of water and avoiding alcohol and caffeine products that can lead to dehydration.
Wearing light, loose-fitting clothing and taking plenty of breaks during physical activity can also help keep the body from overheating.
Ngo also cautioned against leaving small children in a vehicle for even a few minutes, as the temperature can quickly climb to dangerous levels.
At 4 p.m. Tuesday, June 25, the temperature hovered near a humid 82 degrees as the sun broke through scattered clouds.
Mike Arnaz had taken his 7-year-old daughter, Kaylee, to Hoyt Park to run through a mister near the playground. He said she wanted to cool off in the water, because their house was too warm.
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