diff --git a/app/config.py b/app/config.py
index bb1e689..4d734ea 100644
--- a/app/config.py
+++ b/app/config.py
@@ -55,7 +55,8 @@ FIRMS_BBOX = os.getenv("FIRMS_BBOX", "-180,-60,180,75")
 # Poll cadence in seconds. FIRMS NRT updates every ~5-10 min; 900 = 15 min.
 FIRMS_INTERVAL = int(os.getenv("FIRMS_INTERVAL", "900"))
 # Day range for the area-CSV request. FIRMS accepts [1..5] days of NRT
-# detections; the API 400s when this parameter is omitted.
-FIRMS_DAYS = int(os.getenv("FIRMS_DAYS", "1"))
+# detections; the API 400s when this parameter is omitted. Keep >=2: at
+# some hours "1" returns zero detections due to NRT data latency.
+FIRMS_DAYS = int(os.getenv("FIRMS_DAYS", "2"))
 # Outbound HTTP timeout for the FIRMS CSV download.
 FIRMS_TIMEOUT = float(os.getenv("FIRMS_TIMEOUT", "60"))