The National Weather Service (NWS) has issued a heat advisory for Wednesday in Montgomery County and the Metro area from 11 a.m. to 9 p.m. with the heat index expected to be 105 degrees. The maximum temperatures are expected to be 100 degrees in the cities and in the high 90s elsewhere.

Heat illnesses are possible due to the combination of hot temperatures and high humidity, according to the NWS.

NWS warns that one should never leave small children or pets unattended in vehicles as temperatures inside vehicles can rapidly climb to 130 degrees.

The forecast for Montgomery County is partly sunny with scattered showers and thunderstorms in the afternoon. The chance of rain is 40 percent.

NWS Recommendations During a Heat Advisory

• Drink plenty of fluids.

• Stay in an air-conditioned room.

• Stay out of the sun.

• Check in on relatives and neighbors.

• Take extra precautions if you work or spend time outside, and—when possible—reschedule strenuous activities to early morning or evening.

• Know the signs and symptoms of heat exhaustion and heat stroke.

• Anyone overcome by heat should be moved to a cool and shaded location.

• Heat stroke is an emergency: Call 9 1 1.

• Wear light-weight and loose-fitting clothing when possible.

For more information, consult the National Weather Service's website.