Outage in Heroku
Investigating an issue with elevated H99 Errors
Resolved Minor
Need to monitor Heroku outages?
Stay on top of outages with IsDown. Monitor the official status pages of all your vendors, SaaS, and tools, including Heroku, and never miss an outage again.
Start Free Trial
Outage Details
Beginning at 23:17 UTC on September 24, 2025 and continuing until 00:39 UTC on September 25, 2025, impacted customers experienced elevated H99 errors on network runtime in US & EU. This issue is now resolved.
Latest Updates ( sorted recent to last )
RESOLVED
3 days ago - at 09/25/2025 02:13AM
Beginning at 23:17 UTC on September 24, 2025 and continuing until 00:39 UTC on September 25, 2025, impacted customers experienced elevated H99 errors on network runtime in US & EU. This issue is now resolved.
ISSUE
3 days ago - at 09/24/2025 11:40PM
Beginning at 23:17 UTC on Sept 24 2025, Heroku runtime is experiencing elevated H99 platform errors in US & EU. Our engineers are working to resolve the issue.
INVESTIGATING
3 days ago - at 09/24/2025 11:26PM
Engineers are investigating an issue with H99 Errors in US & EU.
Latest Heroku outages
Issue with DNS for New Apps and Domains - 11 days ago
Be the First to Know When Vendors Go Down
With IsDown, you can monitor all your critical services' official status pages from one centralized dashboard and receive instant alerts the moment an outage is detected. Say goodbye to constantly checking multiple sites for updates and stay ahead of outages with IsDown.
Start free trialNo credit card required · Cancel anytime · 4484 services available
Integrations with
