Heavy rain and thunderstorms through Wednesday. SINAPROC extends prevention alert

On 21 September 2026, SINAPROC extended a national prevention alert for moderate-to-very-strong rains and thunderstorms through 23:59 Wednesday 23 September, citing IMHPA (monsoonal trough, southerly winds, and low pressure).

The window runs from Monday 21 September around 10:30 through mid-week. Expect prolonged storms, lightning, gusts, and heavy rain periods. Extra caution applies on Caribbean and Pacific coasts and for maritime sectors. IMHPA also flagged higher creek levels and landslide risk on 21 September.

Practical tips from authorities:

• Avoid river crossings and flood-prone zones
• Stay indoors during lightning
• Secure loose outdoor objects
• Watch for slides, swollen rivers, and falling trees
• Contacts: SINAPROC 520-4426 or 911

What it means for daily life: Commutes, coastal trips, flood-prone neighborhoods, and outdoor plans may be disrupted through Wednesday.

Sources

• Telemetro
• TVN
• IMHPA

Time-limited alert with regional variation — follow live SINAPROC and IMHPA updates.