Tropical Wave #28 has a 40% probability of becoming a tropical cyclone.
- Costa Rican Red Cross photo -

Published on Thursday, August 26, 2021
By the A.M. Costa Rica staff

The National Emergency Commission alerted about an increase in rains due to the passage of two tropical waves, the #27 and #28 of the green season.

Tropical Wave #28 has a 40% probability of becoming a tropical cyclone while crossing the northern Caribbean Sea in the next 24 hours, the Weather Institute said in its statement.

According to specialists, the  wave #27 began crossing the country Wednesday. The second natural phenomenon, #28, could hit the country on Friday and its effects continued over the national territory on Saturday.

Specialists are observing two more new tropical waves, the #29 and #30. The first is located near the Eastern Coast of Venezuela. The second is located in the Atlantic Ocean. Both are advancing their way to Panama and the Caribbean Sea.

The intensity of the rains is increasing due to the Inter-tropical Convergence Zone that is located near the country's Pacific Coast.

The Intertropical Convergence Zone, known by sailors as the doldrums or the calms due to the dull windless weather, is the area where the northeast and southeast trade winds converge. The zone appears as a band of clouds, usually thunderstorms, that circles the globe near the Equator. This caused the overflowing of rivers and floods mainly in the mountainous areas of the country.

Orange Alert in the Pacific Coast (Guanacaste and Puntarenas provinces) and the southwest of the Central Valley (also known as the Greater Metropolitan Area made up of cities in the outskirts of San Josť Province, such as Alajuela, Heredia and Cartago). The alert is activated when the high-risk situation can cause an emergency to the people in a specific area.

Specialists warn that in the mountains of the North Zone and the west of the Central Valley there is a high accumulation of water in the soil due to the abundant weekend rains.

Attention is recommended in the cantons of Desamparados and Moravia in San Josť Province, Turrialba in Cartago Province, San Ramon and Orotina in Alajuela Province, and Garabito in Puntarenas Province, those places are already in danger after the heavy July rains.

Yellow Alert status continues in place for the rest of the country. This alert prepares rescue forces for an increased danger of a natural phenomenon that may impact the population in a specific region.

Authorities call on the public to take the following precautionary measures to avoid emergencies:

- Avoid aquatic activities in rivers (located in Emergency zones) such as swimming, diving, rafting, canyoning, river bugging, kayaking, cliff jumping, fishing, sailing, among others.

- Stay informed about alerts issued by the authorities.

- People living in mountain areas should increase precautionary measures against a possible landslide or material falling from the high areas of the hills.

- Have an emergency evacuation plan in the community, work and home.

- Drivers must increase precautions for heavy rain and fog.

- Take precautionary measures in case of electrical storms.

- Be alert in vulnerable areas to flooding due to sewer saturation or an increase of river flow.

- In case of a thunderstorm, take refuge in a safe place.

- In case of strong gusts of wind, be alert to possible falling tree branches or electrical cables.

- In the event of a landslide, do not walk on the debris, stay away from affected areas, and do not return home until authorities verify that it is a safe place.

Call 911 to report any possible flooding, fallen trees or landslides.

The National Emergency Commission announced a budget of $3,085,111 to address emergencies caused by nonstop thunderstorms in July.

A.M. Costa Rica urges readers to share this alert with their contacts.

What emergencies have been reported in your community caused by the rains?
We would like to know your thoughts on this story. Send your comments to

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