USA – Southern California and the Southwest US are experiencing a significant heat wave this week. More than 29 million people in California alone are under an excessive heat warning or heat advisory.
If you live in areas affected by this heat wave, please follow health advisories to stay cool, stay hydrated, and stay safe. And watch for wildfire advisories while youre at it.
Heat waves are dangerous
Extreme heat can cause heat exhaustion, heat stroke, or even death. Symptoms to watch for include dizziness, headaches, nausea, muscle cramps, and loss of consciousness. Be especially vigilant for children, the elderly, those with pre-existing health conditions, those who work or play outdoors, and your pets. (For more on how to stay safe in extreme heat, refer to guidance from the CDC.)
Unfortunately, climate change is increasing the frequency and severity of heat waves. According to the EPA:
Nationwide, unusually hot summer days (highs) have become more common over the last few decades. The occurrence of unusually hot summer nights (lows) has increased at an even faster rate. This trend indicates less cooling off at night.
Furthermore, heat waves that arrive earlier in the summer can have worse health impacts because peoples bodies have had less time to adjust to the warm weather. And the longer a heat wave lasts, the more severe the cumulative effects can be.
On the other side of the world, India has already experienced a serious early heat wave in April, and recent research shows that even a small increase in global average temperature (which is very likely with climate change) is projected to cause a huge increase in heat-related deaths there.
Hotter, drier conditions also raise risks of wildfires
The wildfire season in the Southwest is also underway. Many of the same areas experiencing this weeks heat waveincluding parts of Arizona, New Mexico, and Californiaare also forecast to have an above-normal wildfire risk this month (see map).
Thats no coincidence: in many parts of the world hotter, drier conditions are also contributing to growing risks of wildfires.
Arizona currently has more than 12 active wildfires and the state has already seen dozens of fires this year. California has also seen a number of wildfires over the past month; officials warn that the risk continues to be high. Ironically, winter precipitation in these states has helped provide more fuel for fires, stimulating the growth of brush and other vegetation that is now drying out in the hot temperatures.
Halfway across the world, Portugal is experiencing terrible wildfires, where more than 60 people tragically lost their lives this past weekend after getting trapped by raging fires. The country is, of course, focused on the emergency response and is in a state of mourning. Unfortunately, Portugal has been experiencing bad wildfires seasons year-on-year. Earlier this year, Chile also experienced devastating wildfires.
Drought and extreme heat are important contributing factors in all these cases, and frequently faulty forest and land management policies are also implicated.
Managing the risks of wildfires
Wildfires are inevitably a consequence of several factors, including the weather, winds, and the condition of forests and underbrush, plus the proximate causes such as lighting or human activities. Here in the US and many parts of the world, climate change is making hotter, drier conditions more likely and worsening the risks of wildfire.
Development in wildfire-prone areas also exposes more people and property to the risks of harmful impacts. The smoke from wildfires can also impose harmful health impacts on people living hundreds of miles awayrecent research shows that the air pollution from wildfires is significantly higher than previously understood.
To manage wildfire risks and impacts, we will have to work on solutions on all these fronts.
Cutting the Forest Service budget is a bad idea
Given what we know about these growing wildfire risks and the need to take robust action to protect people and healthy forests, the Trump administrations proposed cuts to the US Forest Service budget are a particularly bad idea. For instance, the presidents FY 2018 budget proposes to cut funding for forest health management by about $9 million relative to FY2017 (more specifically, relative to the FY 2017 annualized Continuing Resolution level), which would reduce the resources available to cope with disease and pest outbreaks that kill trees. The hazardous fuels management budget would take a hit of $20 millionmeaning that there would be less money to manage or thin forests to reduce wildfire risks near where people live. The budget also proposes to cut funding for volunteer fire departments.
Last week Tom Tidwell, Chief of the USDA Forest Service, testified about the budget before the Senate Committee on Energy and Natural Resources. At the hearing, there was bipartisan push-back to these cuts. Senator Murkowski (R-Alaska) said:
While some of the agencys recommended budget cuts are worth considering, others, like the proposed cuts to recreation programs, are concerning. Some could impact critical forest management activities, like firefighting and hazardous fuels reduction. And some appear to contradict other proposals in the budget, so we will need to review all of these very carefully, as we work on our budget for the next fiscal year.
And Senator Cantwell (D-WA) said:
President Trumps proposal reduces funding for fighting wildfires. This budget proposes a decrease of almost $300 million for fighting wildfires and another decrease of $50 million for preventing wildfires.
A way forward on wildfire and climate policy?
Senators Murkowski and Cantwell have a long history of working together to find solutions for improving forest management and fixing wildfire budgeting.
I hope Congress will reject the harmful budget cuts proposed by the Trump administration, and step up and pass legislation to address these critical issues as soon as possible. People who live in wildfire-prone areaswhether in California, Arizona, Alaska, or Georgiacannot afford further delays or back-sliding.
We also have to continue to work with the global community to limit the heat-trapping emissions that are driving climate change and worsening the risks of deadly heat waves and wildfires worldwidedespite the Trump administrations stance on the Paris Climate Agreement.
Tropical peat swamp forests, which once occupied large swaths of Southeast Asia and other areas, provided a significant “sink” that helped remove carbon dioxide from the atmosphere. But such forests have been disappearing fast due to clear-cutting and drainage projects making way for plantations. Now, research shows peatlands face another threat, as climate change alters rainfall patterns, potentially destroying even forested peatlands that remain undrained.
Read more at: https://phys.org/news/2017-06-peatlands-dwindling-losses.html#jCpTropical peat swamp forests, which once occupied large swaths of Southeast Asia and other areas, provided a significant “sink” that helped remove carbon dioxide from the atmosphere. But such forests have been disappearing fast due to clear-cutting and drainage projects making way for plantations. Now, research shows peatlands face another threat, as climate change alters rainfall patterns, potentially destroying even forested peatlands that remain undrained.