Joe JonasandSophie Turnermight not be feeling so cool at their wedding in the South of France this weekend.

The pair, who are holding their second ceremony at an 18th century chateau in Sarrians, Provence, will be tying the knot during a heat wave that French officials are calling “exceptional,” according to a translation of theMinistry of Solidarity and Health’s website.

AccuWeatherissued a “red warning for extreme high temperatures” for the region, and warned people in the area against spending too much time outside.

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Sophie Turner,Joe Jonas

“Each of us, even in good health, is threatened,” the website reads, noting that the elderly, people with chronic illnesses and people who are isolated are at a higher risk. “Athletes and people who work outdoors should be careful of dehydration and heat stroke. Pay particular attention to children.”

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Sophie Turner Joe Jonas France

The government agency also urged people to call a doctor if they feel faint, and told residents to check on others in their area who may be at risk at least twice a day.

“During the day, close shutters, curtains and windows,” the statement continued. “Ventilate at night, Use fans and/or air conditioning if available. Otherwise try to go into a cool or air-conditioned environment (supermarkets, cinemas …) two to three hours per day. Wet your body several times a day with an atomizer, a washcloth or taking showers or baths. Drink at least 1.5L of water per day, even if you do not feel thirsty. Continue to eat normally. Do not go out during the hottest hours (11h-21h). If you must go out, wear a hat and light clothes. Limit your physical activities.”

Sophie Turner and Joe Jonas arrive at the Château de Tourreau.

Sophie Turner Joe Jonas France

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Chateau De Tourreau

TheGame of Thronesactress was photographed in the casual white ensemble she arrived at the venue in earlier that day before changing into a bikini and white robe for their aquatic fête, while Joe swapped his slacks for a pair of red-and-white trunks.

Their French ceremony marks the second wedding for the couple, whoofficially tied the knot in Las Vegasin May following the Billboard Music Awards. The pair have been in France for a week now, exploring Paris as they prepare for their nuptials.

WATCH THIS: Oops! Did Dr. Phil Just Give Away the Date ofJoe Jonasand Sophie Turner’s Wedding?

Last Thursday, the superstar couple werespotted outside the Hôtel Costes with friendsafter dinner.

Then over the weekend, both Turner and Jonasposted the same sweet selfieshowing them about to share a kiss on the Seine River bridge, in front of the Eiffel Tower.

Joe Jonas and Sophie Turner.Sophie Turner/Instagram

Sophie Turner and Joe Jonas

While fans of the duo have known for months that they were planning a wedding in France, none other thanDr. Phil McGrawrevealed the actualdate of the ceremony.

“Easy now! 1 week to go! Ha! See you at the wedding!” the talk-show hostcommented on Turner’s postof the Eiffel Tower picture.

Asource previously told PEOPLEthat the two were planning a more traditional ceremony in Europe for this summer, but “had to getmarried in the States to make it legal.”

source: people.com