People with asthma and other breathing difficulties should be extra cautious in the coming days as dirty air stifles the UK and increases pollen count. Rising temperatures spur trees to spray clouds of lovely pollen as a cloud of smog and factory smoke sweeps across the continent. The combination of airborne toxins and allergens threatens to trigger the so-called "gray fever" in millions of summer allergy sufferers.
Heatwave Warning: The number of pollen will soar this week as pollution levels also rise dramatically
The condition is triggered when pollen and pollution increase simultaneously to produce a deadly cocktail of irritants.
The pollution is related to pollen, which forms charged particles of allergy, more commonly affecting people living in built-up areas.
Sonia Munde, Head of Services for Asthma UK, said, "This week, a deadly pollen bomb is being hit that can expose people with asthma to a potentially life-threatening asthma attack.
"About 3.3 million people with asthma are affected pollen, which can lead to symptoms such as wheezing, too heavy chest or cough.
"Trees have been releasing their pollen for several weeks, but the warm spring weather will increase these pollen counts.
"If you already have symptoms, it's not too late to help yourself if you stay healthy. Take your prescribed medicine to soothe your irritated airways, so you will be less responsive to the pollen release.
"Take hay fever medications such as antihistamines because they stop the allergic reaction, cause asthma symptoms, and keep itchy eyes and runny noses away."
According to Met Office's forecasts, pollen numbers will skyrocket over the next few days, peaking in southern, central, and northern Britain mid-week to mid-week.
Heat Wave Warning: Pollen forecast for the office this week
This week, a deadly pollen bomb is hit, exposing people with asthma to a potentially life-threatening asthma attack
It is predicted that high pollen numbers will persist throughout much of the country during the weekend.
Separate government air quality forecasts show moderate levels of pollution in southern, western and parts of eastern Britain on Wednesday.
Although this will be partly clear by the Easter weekend, but according to Defra (Department of Environment, Food and Rural Affairs) the Good Friday will remain until Good Friday.
A spokesperson said: "Moderate air pollution areas may affect some regions in central and southern England and parts of Wales on Wednesday and Thursday.
"On Friday, isolated areas of moderate air pollution may affect some coastal areas."
Last Heatwave: Prev'Air PM2.5 levels rise this week
The European air monitoring service Prev'Air predicts that the smallest PM2.5 particles will contribute significantly to the smoggy conditions expected in the middle of this week.
PM2.5 and PM10, which are also expected to travel from Europe to the UK, are tiny particles of soot and metal thrown into the air by vehicles and factories.
As the weather in Britain gets warmer and sunnier, so does the percentage of self-bred ozone that can affect some people's breathing.
Ozone levels in parts of the country, including Scotland and South West England, could be shaken by 120 micrograms per cubic meter this week, according to the Prev & # 39; Air charts.
Everything over 100 micrograms – reduced from 120 in 2005 – is considered to be of concern by the World Health Organization (WHO).
Prev'Air ozone cloud to stifle Britain
A spokesman said, "Too much ozone in the air can significantly affect human health.
"It can cause respiratory problems, trigger asthma, reduce lung function and cause lung disease.
"In Europe, it is currently one of the largest air pollutants."
A spokesperson for the European Environment Agency added, "Because ozone is a potent oxidant, it can react with a variety of cellular and biological components and affect respiratory or lung tissues.
"Symptoms such as coughing, throat irritation, and chest tightness have been reported at the same exposure range, which also affects lung function.
"Studies show that the rate of asthma attacks and drug use increases on days with higher ozone concentrations."
Allergen experts warn that pollen and pollution work together to exacerbate symptoms in people with hay fever and respiratory problems.
Max Wiseberg, an airborne allergen expert and founder of HayMax Barrier Balms, said people should be extra careful over the next few days.
He said, "Once again, we are looking at a situation where warm weather this week is likely to trigger a pollen bomb blast, leading to very high numbers in parts of the country.
"We also look at rising levels of pollution, together this can be a lethal combination for people suffering from seasonal allergies.
"The combination of pollens and pollution aggravates the symptoms in many people. These include runny eyes and noses or difficulty breathing.
"It is recommended to take antihistamines and use nasal barrier balms to avoid symptoms before they start."