SOUTH DAKOTA - As temperatures reaches into the 90s and 100s and the increase in dewpoints, heat indexes are forecast to get into the 100s.
Remember to take precautions when working or spreading time outdoors. Drink plenty of fluids and try to spend time in an air conditioned room. Also stay out of the of the sun, and do a follow up with your neighbors. Young children and pets should NEVER be left unattended in vehicles as temperatures inside a vehicle without air condition will quickly heat up to dangerous levels.
By later on this evening and into tonight, severe thunderstorms are expected to develop. The main threat will be damaging winds and large hail. Isolated tornadoes are possible with these storms as well. The best risk for severe thunderstorms will be across the west.