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UV Index
To find the current UV index for the Thunder Bay District, please visit Environment Canada's page: Thunder Bay's Current Weather Conditions
UV Index
UV Index
Description
Low (1-2)
Sunglasses (bright days)
Cover-up (> 1 hour)
Sunscreen SPF 30+ (> 1 hour)
Medium (3-5…
When to seek medical care for an infant or young child under 6 years old with Influenza-like illness
Opioids
Opioids are drugs that are used primarily to treat pain. Opioids can also induce euphoria (feeling high) and are sometimes used for this purpose. Opioids can be prescribed medications dispensed from a pharmacy or obtained through the illicit market. Some commonly used opioids include:…
Caution - This sign can be used to communicate to visitors when a facility is monitoring signs and symptoms of illness.
Declared - This sign can be used to communicate to visitors when an outbreak is declared.
Reviewed October 2025
The Thunder Bay District Health Unit provides information on a large number of infectious diseases. Diseases are listed from A-Z below for your convenience.
PLEASE NOTE: This page provides up to date information about active outbreaks within the city of Thunder Bay and the District communities.An outbreak is declared in a facility when there is a higher than normal rate of respiratory or gastrointestinal symptoms among the residents. The public…
The Northern Fruit and Vegetable Program (NFVP) is serving fresh fruit and vegetables to elementary students in the District of Thunder Bay! Since 2006, the NFVP has been wildly successful with children in the northeastern region of Ontario, and as of May 2018, the program expanded to our region.…
What is RSV?
Respiratory syncytial virus (RSV) is a common virus that infects the lungs and airways (breathing passages). RSV can affect anyone of any age, but it's most common in infants and young children. Almost all children get RSV at least once before they are 2 years old. RSV is usually a…