It’s getting warmer again in Denver; according to the National Weather Service, temperatures in the city reached almost 38 degrees Celsius on Saturday afternoon.

If Denver hits the forecast 37 degrees, Saturday will be the hottest August 17 on record in the metro area, according to NWS records. Just one more degree and Saturday’s heat will break the record.

The current 98-degree record was set in 2020.

Temperatures are expected to peak at 37 degrees around 4 p.m. Saturday and then drop to 19 degrees overnight, NWS meteorologists said.

The chance of afternoon thunderstorms in the metro area is low — just under 10% — and any showers hitting Denver should be over by 9 p.m., NWS meteorologists said.

“Most will remain dry, but isolated showers at high altitudes are expected in the mountains in the evening,” Meteorologists said“These will worsen in the face of dry conditions as they attempt to advance into the urban corridor, although they may generate gusty winds at times.”

Due to increasing heat, an “Ozone Action Day” warning has been issued for Colorado’s Front Range – which includes Douglas, Jefferson, Denver, western Arapahoe, western Adams, Broomfield, Boulder, Larimer and Weld counties – and will last until at least 4 p.m. Saturday.

According to the Colorado Department of Health and Environment, Ozone Action Days are declared when the air quality index is forecast to reach levels that are harmful to health due to a combination of ozone, wildfire smoke and other pollutants.

Short-term exposure to harmful levels of ozone can cause coughing, eye, nose and throat irritation, chest pain, difficulty breathing and asthma attacks, according to government agencies. Long-term exposure is linked to a range of health problems, including lung and cardiovascular disease and premature death.

People in affected counties should stay indoors during the heat of the day, avoid driving gasoline or diesel vehicles until the warning is lifted, and conserve energy by setting air conditioners to a higher temperature, air quality agency officials said.