With temperatures set to reach the triple digits again this week, officials are warning against heat-related health emergencies.

National Heatstroke Prevention Day is July 31.

The National Highway Traffic Safety Administration (NHTSA) is asking for help to raise awareness about the danger of heat to kids — in particular, children who are left in cars during days with high temperatures.

As of July 10, there have been 19 heatstroke deaths just this year of children who have been left in cars.

Starting at 6 a.m. July 31, NHTSA will use the hashtags #heatstrokekills and #checkforbaby on all of its social media every 30 minutes, including Facebook, Instagram and its Twitter page, @NHTSAgov.