Marylanders should expect temperatures to rise into the triple digits across the region starting Wednesday, according to the National Weather Service.

It won’t be as hot as the Fourth of July weekend, when the region saw record-breaking high temperatures, but Central Maryland could see a high of 102 on Wednesday and a high of 101 on Thursday. The heat index will be 105 for both days, said Kevin Rodriguez, a meteorologist for the weather service’s Baltimore/Washington office. The weather service issued a heat advisory for most of Maryland that will be in effect until 8 p.m. on Wednesday.

Baltimore issued a code red extreme heat alert for Wednesday and Thursday, activating cooling centers around the city ahead of the high temperatures. The city’s Office of Emergency Management reminded residents to check on at-risk neighbors and relatives for heat-related illnesses and to keep pets inside. At least two people have died from heat-related illness this summer so far in Baltimore, according to a news release from the city.

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Officials in Howard County, which is also under a heat advisory, listed cooling centers and warned people to take extra precautions when they go outside on Wednesday.

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Scorching heat during the Fourth of July weekend delayed festivities, canceled events and disrupted travel. A powerful line of thunderstorms also caused widespread power outages, leaving about 70,000 people without power.

Temperatures will drop slightly over the weekend into the 90s and 80s as showers are expected to wash over Central Maryland.