A Code Red Extreme Heat alert has been put in place for Baltimore between Thursday and Sunday due to heat index temperatures expected to reach over 100 degrees.

The first Code Red alert was called last month with high heat ushering in the summer months. The Mayor’s Office of Homeless Services will offer cooling centers at various sites during this time. You can find a cooling center with this map from The Banner.

“As we prepare to enjoy the 4th of July holiday, we should prioritize our safety while having fun. Amidst the extreme heat, residents should stay hydrated, remain indoors with a working air conditioner or fan, and be sure to check on vulnerable neighbors,” Baltimore City Commissioner of Health Dr. Ihuoma Emenuga said in a statement.

The forecast high heat is matched with potential storms and showers of the July Fourth holiday.

Showers and thunderstorms are expected in the afternoon and evening, following a day of high heat.

The forecast for Thursday is a high of 92 degrees in Baltimore, and a chance of showers and thunderstorms after 2 p.m., according to a National Weather Service forecast early Wednesday evening .

“We would advocate being up to date with the weather before going to any firework shows or celebrations, and seeing if it is going to impact your plans,” said Chesnea Skeen, a meteorologist for the Baltimore-Washington office of the NWS.

The days after the holiday also bring high heat, with thunderstorms expected Friday and Saturday, when temperatures could reach a high of 96 degrees. Sunday will be mostly sunny with a forecast high of 94 degrees.

Skeen suggests looking out for individuals that are more susceptible to heat-related illness such as older adults, young children and pregnant women.

There have already been two heat-related deaths in Maryland this year, and this summer has been marked by record-breaking heat.

“If folks are outside during the day they should be sure to stay hydrated and seek out shade,” Skeen said.

Fireworks and other Independence Day events could be affected by the weather. It is generally unsafe to use fireworks during turbulent weather conditions.

Skeen said it’s best to stay indoors if there is lightning in the area.

“For the showers and thunderstorms in the afternoon and evening, as we always say, ‘If thunder roars go indoors, if you see a flash, dash inside,’” Skeen said.