Context: https://discord.com/blog/a-letter-to-the-discord-community-in-brazil

Translation:

Hello!

Our voice servers in Brazil are currently a bit overloaded due to the large increase in the number of new Brazilian users joining the platform.

We sincerely appreciate your patience while we work to resolve the issues causing high latency. In the meantime, if you’re experiencing difficulties, you can try connecting to the US West or Chile voice regions. The Chilean servers are stable and may offer good latency for users in Latin America.