Leaving a dog in a hot vehicle is illegal in California. Learn state law about animal safety, heat stroke symptoms and what to do if you see a pet in danger.

When July arrives, the heat not only tightens... it drowns. In many parts of the country, there is a word that begins to be heard every time the heat becomes unbearable: canicula.

Heat-related illnesses occur across a spectrum, and mild heat stress can quickly progress to life-threatening heat stroke if a person is exposed to dangerous conditions for too long.

A heat wave is currently affecting about 160 million people, according to the National Weather Service. Here's which states feel the hottest.

A heat wave is currently affecting about 160 million people, according to the National Weather Service. Here's which states feel the hottest.

Extreme heat is impacting states across the country. See maps of high temperature forecasts and heat index levels.

Extreme heat is impacting states across the country. See maps of high temperature forecasts and heat index levels.

Common medications may make you more susceptible to heat stroke and heat exhaustion. Here, experts share which contribute to dehydration and temperature issues.

Seven graduations that were also supposed to be held at Hinchliffe Stadium were rescheduled due to the sweltering heat.