CLARKSVILLE, TN (CLARKSVILLE NOW) – With a heat index of 105 expected, we’re under a Heat Advisory today. But rain is coming Monday, and it could continue all week.

The National Weather Service has issued a Heat Advisory for Montgomery and surrounding counties through 7 p.m. tonight. The high should be near 98, with the index as high as 105.

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“Hot temperatures and high humidity may cause heat illnesses to occur,” the NWS said. “Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances.”

Monday will bring a 60% chance of thunderstorms, and each day next week will bring a 50% to 60% chance of more showers and storms.

Clarksville forecast

Here’s the day-by-day outlook.

This afternoon: Mostly sunny and hot, with a high near 98. Heat index values as high as 105. Southwest wind around 10 mph.

Tonight: Mostly cloudy, with a low around 75. South southwest wind around 5 mph.

Monday: Showers and thunderstorms likely, mainly between 1pm and 3pm. Partly sunny, with a high near 93. Heat index values as high as 105. South southwest wind 5 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday night: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Mostly cloudy, with a low around 73. East southeast wind around 5 mph becoming south after midnight.

Tuesday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 94. Southwest wind 5 to 10 mph.

Tuesday night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75. South wind 5 to 10 mph.

Wednesday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94. Southwest wind 5 to 10 mph.

Wednesday night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. South southwest wind around 5 mph.

Thursday: Showers and thunderstorms likely. Mostly cloudy, with a high near 90. West southwest wind 5 to 10 mph. Chance of precipitation is 60%.

Thursday night: Showers and thunderstorms likely, mainly after 1am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.

Friday: Showers and thunderstorms likely. Mostly cloudy, with a high near 86. Chance of precipitation is 60%.

Friday night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.