The heat index this afternoon will reach the mid-90s across the mainland.
Know the signs of heatstroke before it’s too late. Some of the symptoms include rapid heartbeat, no sweating, dizziness and headache, and vomiting. Heat stroke can also cause unconsciousness.

Prevention
You can avoid the sun by limiting your outdoor time, wearing protection such as sunscreen and a hat, drinking PLENTY of water, and don’t wear thick clothing.
What do you do if you suspect someone is suffering from heatstroke?
An article from The Mayo Clinic says to call 911 immediately and to move the person out of the heat right away. Spray the person with cool water from a water hose. The Mayo Clinic also says to begin CPR if the person loses consciousness and shows no signs of circulation, such as breathing, coughing, or movement.
Sources:
Mayo Clinic – Heatstroke: First Aid
https://www.mayoclinic.org/first-aid/first-aid-heatstroke/basics/art-20056655