Warming temperatures leading to increasing pest populations

2019 was the second hottest year on record and the 2010s was the hottest decade on record. Cold temperatures, especially during the winter, are important in limiting pest populations. As temperatures warm over the years, pest populations get a head start. Brief spells of cold temperatures are known as "cold snaps" and these are becoming shorter and less frequent.

This trend is shown across the United States.

Juan Ramirez is a branch manager for Truly Nolen Pest Control, in reference to insects he says, “When it gets warmer and it gets warmer earlier, they come out a lot earlier too.” Emphasizing, “They love the warm, they love the heat. The hotter the better.”

We also spoke with Tammy Gordon, the Public Information Officer with the Coachella Valley Mosquito and Vector Control who talks specifically about mosquitos, saying, "Last year in particular, with the West Nile Virus, which is our native species carries that virus, it actually started much earlier in the season. We came out with our first West Nile in early May, which historically has been more towards June or July.”

The desert sees a short time period of cooler temperatures. The reason insects are less common during this time is that they become more lethargic. When it's cold they don't have the ability to move and breed.

Among other variables seen in a year, Gordon states, “So with the increasing temperatures coming, it just gives them a little bit more of an opportunity to start earlier.”

Ramirez has been working in pest control for 32 years and he says, “We notice that the winters are getting shorter and there are more bugs out there more months than when I started.”

People at home can try to mitigate the problem by doing many things. Keeping the doors closed is important, especially during the summer months. It's important to make sure your doors and windows are sealed properly. If you have any standing water outside your home it is important to be mindful of this as it's exactly where mosquitos thrive.

Ramirez ended by saying, "Obviously do your own pest control or contact a professional… because the bugs will overrun you.”

More information on the warming winters can be found here with Climate Central.