Extended heatwaves in New Orleans have been tied to spikes in domestic violence-related calls, according to a new, robust peer-reviewed study. This year, New Orleans has faced 20 heat advisories and three extreme heat warnings, according to the National Weather Service. Projections show lengthy heatwaves will occur even more frequently in the coming decades, potentially exacerbating the city’s existing problems with domestic violence. She said this type of information can help to mitigate domestic violence but stressed that heat, or other factors like alcohol use, does not cause domestic violence. “But I don’t think anything really causes domestic violence except the person who is using the violence.