In addition to the shooting at a garlic festival in Gilroy, California, seven other mass shootings happened in the US over the weekend.

At least eight people were killed and nearly 50 were injured.

Visit INSIDER's homepage for more stories.

The shooting at a garlic festival in Gilroy, California, was one of eight mass shootings that took place across the US over the weekend.

At least eight people were killed, and 46 were injured, in mass shootings that spanned the country from Washington, DC, to Kennewick, Washington, according to the Gun Violence Archive's tally. The organization defines a mass shooting as a single incident in which at least four people are shot not including the gunman.

The numbers follow a trend seen every summer in America — as temperatures heat up, killings become more likely.

An analysis from The New York Times last year found that more than twice as many people were shot in northern cities such as Chicago when it's hot as when it's cold.

The Giffords organization, which studies gun violence, says murder spikes in the summer months, especially in impoverished communities in urban areas.

Gabrielle Giffords, the former Arizona congresswoman who founded the organization after she was shot, released a statement Monday saying, "We know this feeling of heartbreak and horror too well."

"We're 210 days into 2019 and there have already been 246 mass shootings," she said in the statement, adding: "This reality is horrifying. It's heartbreaking. And the fact that our nation's leaders continue to fail to protect us should fuel outrage in every American. This must stop — we must stop this."

Continue to read more about each of these shootings.